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Technical stuff



Anything to do with the electrical system, including lighting and not including audio.

  • 2,391 topics
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Transmission wont shift and... - last post by 67Truckin


Post questions, comments and answers to any ZR2 engine related matter. It's a 262cubic in 4.3 liter V6. It's rated at 190hp or so. Don't forget that your local "Autozone" will read your SES code for FREE. Find out here what they mean and what you need to do about it...

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ignition timing advance dur... - last post by 03SONOMAZR2


Here we discusss the transmission; transfer case; driveshafts; rear end (on the trucks, that is); etc.

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NP231 and bravada shaft que... - last post by Olie8


Shocks; torsion bars; ball joints; leaf springs; CV joints; idler arms; etc. It's all inside.

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Rough County Control Arm Ba... - last post by jderekt


Talk about the ZR2 exhaust system including the catalytic converter, muffler, etc. See what the popular aftermarket products for our trucks are.

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Looking for best pricing on... - last post by nateszr2

Fuel system

This forum is a GAS. How's your milage? Change your fuel filter lately? Oh- that noise you hear when your truck is running is normal: it's just the submersible fuel pump. When you don't hear it is when you need to worry...

  • 635 topics
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Weird noise and trouble sta... - last post by mushisushi


The round metal things that your tires are attached to. Stock ZR2 wheels are called "PA3's" or "N90's" and the size is 15 x 7 with 6in. of back space on a 5x4.75 bolt pattern. Not sure what "back spacing" is?? Well you better find out before you get aftermarket wheels!!

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PA3 Wheels for FREE - last post by vanr


Those 4 round, rubber thingies that make your Z roll. There should also be a 5th one somewhere in your ZR2 with adequate air pressure. Stock size is 31/10.5/15.

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Dick Cepek Extreme Country - last post by ZR2DAN


Paint; hoods; beds; flares; glass; fenders; etc.

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Rear bumper extension - last post by gsmobile2007


Seats; carpet; dash; gauges; etc. Everything inside your ZR2 except you and your tunes.

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Screw size (length) and type. - last post by Keviness®


Stereo systems. CB's. Alarms.
PUMP up the volume. BREAKER one-nine. STEP AWAY FROM THE VEHICLE NOW!! You get the idea...

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Double DIN Upgrade - last post by ZR2DAN


Give us a BRAKE! 94-97 had rear drums and 98+ had 4 wheel disk with dual piston front calipers.

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ABS  sensor - last post by Burned

Repair Shops, Tools, and Equipment

This is for posting about repair shops (including dealerships): to recommend one, or maybe to NOT recommend one. Tell us your repair shop experience here. Same goes for tools, hand, or power. Talk about different brands, specific applications and specialty tools and your recommendations.

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any reputable shop in ct fo... - last post by swillbee


Talk about the TOW rating of your ZR2, as well as tow vehicles, trailers, etc.

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What do you tow with your Z - last post by rapsure

Ask Mr. Mike: GM Engineer

You may already know Mike. He built the baddest ZR2 that has ever roamed this earth. He drove his ZR2 in Petersen's 4-wheel/Off-Road "Ultimate Adventure" in 2003 and impressed a lot of people with an IFS S10. A "wealth of knowledge", but also an extremely busy man these days. Ask him any specific ZR2 question you may have that you don't feel could be answered elsewhere in the forum. Please be precise. Please be patient. His professional and experienced answers are well worth it. Be sure to visit his website before you leave!

  • 426 topics
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Factory GM CV's vs. Aft... - last post by swillbee