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2002 Z71 Restoration

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  • #61
    On the topic of brake upgrades I happened to stumble on a facebook post where people are bolting on 08+ rotors and calipers. No special modification required, however i would not be able to use my stock 16" wheels anymore. I'd be stuck with the 17s that I plan on running most of the time anyway. These are over an inch bigger and may even have clearance issues on the 17s.
    57485502_10218924942811801_5797140946818695168_n.jpg
    Last edited by JoeliusZ28; April 14th, 2019, 08:29 PM.
    DynoDave and Atrus like this.
    -Joel
    1995 Z28 M6 - AI226/234 - autocross ricer
    1984 Scottsdale K10 - 305/4bbl/4spd


    WTB List:Midwest Chasis DS Loop

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    • #62
      Interesting! If it fits under 17's, I'd consider it. I don't want anything bigger than 17's on the vehicles.

      I also refuse to run cross drilled rotors!
      2000 SS Convertible #1414 - Light Pewter 6 Speed

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      • #63
        Originally posted by Atrus View Post
        I also refuse to run cross drilled rotors!
        The best take. I hate that the PowerStop kits come with them.
        Gone but not forgotten: 1986 Chevrolet Camaro IROC-Z

        "You shall ride eternal. Shiny and chrome."

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        • #64
          Yeah, same thing for me... blank rotors only.

          My main reservation for this was is I was planning on keeping the stock 16s with some highway michelins on them for long haul towing trips. And with this brake upgrade I wouldn't be able to do that. My 17" 285 mud terrains are very close to DOUBLE the weight of the stock 16" 265s. and theyre barely an inch bigger in height and width. I didn;t realize they were going to weigh that much more when i ordered them.


          I could always get a set of newer stock 17s and do the same though.... just going to be more $ in tires.
          Last edited by JoeliusZ28; April 15th, 2019, 03:41 PM.
          -Joel
          1995 Z28 M6 - AI226/234 - autocross ricer
          1984 Scottsdale K10 - 305/4bbl/4spd


          WTB List:Midwest Chasis DS Loop

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          • #65
            It's absolutely insane how much some A/T & M/T tires can weigh.
            Gone but not forgotten: 1986 Chevrolet Camaro IROC-Z

            "You shall ride eternal. Shiny and chrome."

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            • #66
              I didn't know the GMT800 trucks used 16s. My GMT400 Suburban had 16s, and I switched to 17s...thought I was just catching up with the 800 boys!
              DynoDave
              POCI # 72200



              1988 Pontiac Trans Am WS6

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              • #67
                Most 800's came with 16's. The Z-71's (at least in some years) were 17" standard.
                2000 SS Convertible #1414 - Light Pewter 6 Speed

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                • #68
                  I found that GMT800s increased the size of the front brakes optionally in 04 and unanimously in 05, hence 17" wheels becoming standard. In 04 I think you only got the bigger wheels and brakes with the tow package. I'm not sure if the upgraded 800 brakes are the same as the 900s i posted above. Kevin, does your 04 have the bigger brakes along with the hydroboost?
                  -Joel
                  1995 Z28 M6 - AI226/234 - autocross ricer
                  1984 Scottsdale K10 - 305/4bbl/4spd


                  WTB List:Midwest Chasis DS Loop

                  Comment


                  • #69
                    Option Codes
                    *IVH is not the definitive source of GM Vehicle RPO information and is intended for service reference only. Should there be any questions about the vehicle's original build or RPO information please refer to the original vehicle invoice or window sticker.
                    1SL - OFF-ROAD PREFERRED EQUIP. GRP: * AM/FM STEREO CD WITH RDS * FRONT HIGH BACK BUCKET SEATS * IN DASH 6 CD PLAYER * REAR SEAT AUDIO CONTROLS * BOSE PREMIUM SPEAKERS * IST ROW LEATHER SEATING SURFACES * 2ND ROW SEATS LEATHER APPOINTED * ONSTAR SYSTEM INCLUDES 1YR SAFE & SOUND * STEERING WHL MOUNTED CONTROLS * WHEEL FLARES * LOCKING DIFFERENTIAL * SKID PLATES * 17X7.5 ALUMINUM WHEELS * P265/70R17 ON-OFF ROAD TIRES * PWR FOLD AND ADJUST HEATED OUTSIDE MIRROR WITH TURN SIG AND DRIVER SIDE AUTO DIMMING * Z71 SUSPENSION * FRONT AIR DAM * TUBULAR ASSIST STEPS * LUGGAGE RACK WITH RR ROLLERS * FOG LAMPS * CARGO NET * CARGO SHADE * CARGO AREA MAT * TRAILERING PACKAGE * HIGH CAPACITY AIR FILTER OPTION PACKAGE 11 1SZ - PREFERRED EQUIPMENT SAVINGS PREFERRED EQUIPMENT SAVINGS
                    50U - SUMMIT WHITE/DARK GRAY METALLIC 6XM - COMP FRT LH COMPUTER SEL SUSP
                    7XM - COMPONENT FRT RH COMP. SEL SUSP 922 - GRAY/DARK CHARCOAL
                    92I - GRAY INTERIOR TRIM MED GRAY INTERIOR TRIM A31 - POWER WINDOWS
                    AG1 - SIX-WAY POWER DRIVER SEAT SIX-WAY POWER DRIVER SEAT AG2 - 6-WAY POWER DRIVER & PASS SEATS SIX-WAY POWER PASSENGER SEAT
                    AJ1 - DEEP TINTED GLASS AL0 - SENSOR INDICATOR INFLATABLE RESTRAINT FRT PASS
                    AN3 - FULL FEATURE BUCKET SEATS WITH POWER ADJUSTABLE PEDALS FRONT BUCKETS WITH POWER ADJ. AP9 - CARGO CONVENIENCE NET
                    AS3 - THIRD ROW BENCH SEAT CENTER AND REAR SEATS AT5 - FOLDING CENTER SEAT
                    AU0 - KEYLESS REMOTE DOOR LOCK AXP - MPV VIN IDENT POSITION
                    B30 - WHEELHOUSING & FLOOR CARPETING B39 - COLOR KEYED FLOOR MATS/ CARPETED CARPETED LOAD FLOOR
                    B58 - COLOR-KEYED FLOOR MATS CARPETED B71 - WHEEL FLARES WHEEL OPENING FLARES
                    BPH - OFF ROAD APPEARANCE PACKAGE *WHEEL FLARES *LOCKING REAR DIFFERENTIAL *SKID PLATES *17 X 7.5 ALUMINUM WHEELS *P265/70R17 BW OOR TIRES *COLOR KEYED EXTERIOR *Z71 SUSPENSION *16X6.5 ALUMINUM SPARE *SPECIAL ROCKER MOLDINGS *WHEEL CAPS & LUG NUT COVERS *LUGGAGE RACK *FOG LAMPS *FRONT AIR DAM *TUBULAR ASSIST STEPS C25 - REAR WINDOW WIPER & WASHER
                    C36 - REAR HEATER C49 - ELECTRIC REAR WINDOW DEFOGGER
                    C5Z - 7200 LB GVW RATING C69 - AIR CONDITIONING-FRONT & REAR
                    CJ3 - AIR CONDITIONING TRI ZONE MANUAL D07 - CUSTOM FRONT FLOOR CONSOLE
                    DF5 - ISRV MIRROR W/COMPASS & TEMP DH6 - LIGHTED VISOR/VANITY MIRRORS
                    DK7 - INTERIOR CUSTOM ROOF CONSOLE DL3 - OSRV MIRROR W/DRIVER SIDE AUTO DIMMING, PWR FOLD & ADJ, HEAT, TURN SIGNAL
                    DT4 - ASHTRAY MUFFIN ASHTRAY AND CIGARETTE LIGHTER E52 - LIFTGATE/LIFTGLASS
                    EVA - EVAP EMISSION REQUIREMENT FE9 - FEDERAL EMISSIONS
                    FK2 - TORSION BAR SPRING ADJUSTMENT FK3 - TORSION BAR SPRING ADJUSTMENT
                    G63 - ROOF PROVISIONS LUGGAGE CARRIER G80 - LOCKING REAR DIFFERENTIAL LOCKING DIFFERENTIAL-REAR AXLE
                    GT4 - REAR AXLE - 3.73 RATIO JF4 - POWER ADJUSTABLE PEDALS
                    JH2 - BRAKE HYD POWER, DISC/DISC K34 - CRUISE CONTROL ELECTRONIC SPEED CONTROL WITH RESUME SPEED
                    K47 - HIGH CAPACITY AIR CLEANER KG3 - 145 AMP ALTERNATOR
                    KNP - HD AUX TRANS. COOLING SYS KUP - THROTTLE CONTROL ELECTRONIC
                    L59 - VORTEC 5300 V8 FLEX FUEL ENGINE M30 - 4-SPD AUTOMATIC TRANSMISSION 4-SPD AUTO TRANS W/ OVERDRIVE AND ELECTRONIC CONTROL
                    MSL - SILAO MEXICO PLANT N88 - ALUMINUM WHEEL 17 X 7.5,PREMIUM
                    NP5 - LEATHER WRAPPED STEERING WHEEL NP8 - AUTOTRAC ACTIVE TRANSFER CASE 2-SPEED ACTIVE TRANSFER CASE
                    NT9 - EMISSION SYSTEM FEDERAL TIER 2 PHASE OUT FED EMIS SYS TIER 2 PHASE-OUT NZZ - OFF ROAD - SKID PLATES
                    PDC - CARGO PACKAGE INCLUDES: * CARGO NET * LUGGAGE RACK CROSS BARS * CARGO SHADE * CARGO AREA MAT PDH - DRIVER CONVENIENCE PACK INCL: * HOMELINK UNIVERSAL TRANSMIT. * POWER ADJUSTABLE PEDALS * DOES NOT INCLUDE STEERING WHEEL CONTROLS
                    QJP - P265/70R17 OOR BW TIRES R4Y - TIRE BRAND-GOODYEAR
                    R6G - OPTION PACKAGE NOT DESIRED AIR CONDITIONING NOT DESIRED R9U - GM ACCESS - AUTOBOOK IDENTIFIER
                    R9Z - POMS EXPEDITE-SOLD ORDERS POMS EXPEDITE-SOLD ORDERS/TSE RYJ - RETRACTABLE CARGO AREA COVER
                    SAF - SPARE TIRE LOCK SLM - STOCK ORDERS
                    T9H - FRONT FOG LAMP PROVISIONS TRB - GRILLE RADIATOR, BODY COLOR
                    UC6 - AM/FM RADIORDS6 DISC CHANGER AUTO TONE CONTROL AND ETR (REPLACES STD/OPT PKG RADIO) UE1 - ONSTAR COMMUNICATIONS SYSTEM INCL 1 YR SAFE & SOUND PLAN AND STEERING WHEEL CONTROLS ONSTAR SYSTEM INCLUDES 1 YR SAFE & SOUND
                    UG1 - HOMELINK UJ6 - TIRE PRESSURE MONITOR
                    UK3 - REDUNDANT RADIO CONTROLS UK6 - REAR SEAT AUDIO CONTROLS RADIO CONTROLS RR ST & EARPHONE
                    UQ7 - BOSE SPEAKER SYSTEM V43 - PAINTED REAR STEP BUMPER
                    V73 - STATEMENT OF VEHICLE CERT.-U.S. /CANADA V76 - RECOVERY HOOKS
                    VB5 - BUMPER FRONT PAINTED VCT - SHIP THRU CHARGE
                    VR4 - WEIGHT DISTRIB. PLATFORM HITCH VXS - COMPLETE VEHICLE LABEL
                    X88 - CHEVROLET CONVERSION XJP - P265/70R17-114H BW
                    YD3 - BASE EQUIP FOR SCH GVW PL-FT AX YD6 - BASE REAR SPRING
                    YE9 - LS TRIM SILVERADO YJP - P265/75R17-113S BW TIRES
                    Z71 - Z71 EQUIPMENT PACKAGE Z82 - TRAILERING EQUIPMENT INCLUDES: * TRAILERING HITCH PLATFORM * 7-LEAD WIRING CONNECTOR * TRANSMISSION OIL COOLER HD TRAILERING EQUIPMENT
                    ZHS - P265/75R16-114S ALT BW TIRES ZM9 - CONVENIENCE PACKAGE SALES PACKAGE-COMFORT AND SECURITY
                    ZY1 - SOLID PAINT
                    Added Option Codes
                    ~BO -
                    JoeliusZ28 likes this.
                    2000 SS Convertible #1414 - Light Pewter 6 Speed

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                    • #70
                      No that I can tell, but I will check it out in person to see if there's a difference. Yukon is rolling on 16's (it's an SLT). The Suburban is 17's due to Z71 package.
                      2000 SS Convertible #1414 - Light Pewter 6 Speed

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                      • #71
                        They went to 17" wheels with bigger front rotors in '03 or '04, when they went back to drums on the rear. The caliper bracket and rotor from those fit on the older GMT800 trucks.

                        I find the brakes on my '01 to be fine though, when they're working right. A lot of the poor pedal feel comes from bad calipers in the rear. Lately, my pedal feel is all over the place, so I think my vac booster may be iffy. Otherwise, sometimes I swear it feels like the brakes are dragging slightly, so I've also theorized that the MC isn't bleeding off pressure completely when the pedal is released. Aside from feeling like they're dragging, the brake pedal is usually low (i.e. excessive pedal travel) when it's in that "mood". Yet the pedal isn't really soft or spongy. Other days, the pedal feel is perfect. Seems more like an intermittent vac leak, but I dunno.

                        When I bought my T/A, I towed it home on a Uhaul flat bed with this truck. I imagine that was a 4500 lbs load. Stopping and going was no problem at all. I have the front cranked 2" though, and the stock springs squatted a lot, so it was very nose high. Add in that it was exceptionally windy, and I was forced to use back roads. It was just too twitchy for high speeds. BUT, like I said, stopping and starting was absolutely fine.

                        FWIW, my '01 was rated to tow 8,600lbs with the 3.73 gears. I'd do the hydroboost conversion
                        2000 Pontiac Trans Am WS6 M6 | C4 ZR1 Wheels | Borla Cat-back
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                        • #72
                          Originally posted by GlennT View Post
                          They went to 17" wheels with bigger front rotors in '03 or '04, when they went back to drums on the rear. The caliper bracket and rotor from those fit on the older GMT800 trucks.

                          I find the brakes on my '01 to be fine though, when they're working right. A lot of the poor pedal feel comes from bad calipers in the rear. Lately, my pedal feel is all over the place, so I think my vac booster may be iffy. Otherwise, sometimes I swear it feels like the brakes are dragging slightly, so I've also theorized that the MC isn't bleeding off pressure completely when the pedal is released. Aside from feeling like they're dragging, the brake pedal is usually low (i.e. excessive pedal travel) when it's in that "mood". Yet the pedal isn't really soft or spongy. Other days, the pedal feel is perfect. Seems more like an intermittent vac leak, but I dunno.

                          When I bought my T/A, I towed it home on a Uhaul flat bed with this truck. I imagine that was a 4500 lbs load. Stopping and going was no problem at all. I have the front cranked 2" though, and the stock springs squatted a lot, so it was very nose high. Add in that it was exceptionally windy, and I was forced to use back roads. It was just too twitchy for high speeds. BUT, like I said, stopping and starting was absolutely fine.

                          FWIW, my '01 was rated to tow 8,600lbs with the 3.73 gears. I'd do the hydroboost conversion
                          Thats great feedback, thanks! My brakes are in perfect working order however I can tell they have to work harder just by having my heavier mud tires on it. Otherwise a similar setup... 3.73 gears, cranked front, and an add-a-leaf in the rear. My end goal is to have a truck that can tow a car hauler on the highway for long distances and not be sketchy.
                          -Joel
                          1995 Z28 M6 - AI226/234 - autocross ricer
                          1984 Scottsdale K10 - 305/4bbl/4spd


                          WTB List:Midwest Chasis DS Loop

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                          • #73
                            I'm guessing hydroboost was a parts bin master cylinder upgrade for the bigger brakes and the two went hand-in-hand.
                            -Joel
                            1995 Z28 M6 - AI226/234 - autocross ricer
                            1984 Scottsdale K10 - 305/4bbl/4spd


                            WTB List:Midwest Chasis DS Loop

                            Comment


                            • #74
                              Yeah, I have 10 ply BFG All Terrains on mine. That doesn't help either. I hate those tires too. With as bad as the grip is in rain and snow with these, I should've just got the mud tires I wanted.
                              2000 Pontiac Trans Am WS6 M6 | C4 ZR1 Wheels | Borla Cat-back
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                              • #75
                                Originally posted by GlennT View Post
                                Yeah, I have 10 ply BFG All Terrains on mine. That doesn't help either. I hate those tires too. With as bad as the grip is in rain and snow with these, I should've just got the mud tires I wanted.
                                Interesting what size? I had 285s on my last half ton and I loved them, but that is a tire that is very sensitive to being sized correctly. Too narrow they burn up really fast and too wide they will have zero grip in snow/rain. They also don't grip well when they wear out. But a fresh set of correctly sized BFG ATs are some of the best tires ive ever had.

                                Honestly i only changed to mud tires for two reasons.... they look better AND they pick up way less rocks.
                                -Joel
                                1995 Z28 M6 - AI226/234 - autocross ricer
                                1984 Scottsdale K10 - 305/4bbl/4spd


                                WTB List:Midwest Chasis DS Loop

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