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FYI (fer y'all's info...) See a potentially brutal '91 Sy in GM High-Tech Perf magazine, Oct 05 issue. Belongs to Jason Leach of Illinois. A truly gorgeous race Sy.

Thank you both for info. TyMeUp: The GM Fuel & Emissions Service Manual (X-9236, page 4-55) notes a "minimum idle speed check for 7.4L with TBI 220" which directs grounding diagnostic term at ALDL, key on eng off for 10 sec to extend IACV in passage, disconnect IAC connector, then start eng and...

Me too, thank you, sir!

Trevor. Hopefully you are mechanically inclined, or wealthy! HAHA You might purchase GM shop manual series to include Sy/Ty Supplement X-9276 and a quality (Actron, Snap On, etc.) Voltmeter, and educate yourself to care for your truck, or diagnose with a competent mechanic. Sportmachines.com...

Trevor. TCC connector is located on left (driver) side of trans above pan rail, and not real easy to get at, of course. TCC function is also controlled by stop light switch, IE: brakes on, TCC off - you might check it out. Good luck.

Greetings all! My '92 Ty stalls at ecceleration fron idle, and idle hunts. My GM Ty/Sy Supplement X-9276 indicates the throttle body idle screw is "preset at factory" and offers no baseline information. One of the knuckle heads at a GMC garage told me they used this screw to "adjust the idle"...

I couldn't resist. Some time ago an idiot turned in front of me while I was riding an old Triumph. I think my nuts were "broke loose". They were also bigger than anyones for a couple weeks! OWWW! HAHA (well, it is funny now...)

Hey cattig. Do system check for fuel pump relay. If it passses, you proooobably have leaking fuel injector(s). I don't know how to isolate which one(s) without a tester GM Service Manual recommends; visit a tech you trust. Reference your Fuel Pressure post, you are measuring with vac line...

Checkout techweasel.com

The GMC S/T Series Truck Service Manual (1992) shows "tool J-39177 Combination Valve Pressure Bleeding Tool" and says three required; also references Tech 1 Scan Tool and cartridges for 4WAL systems. I did not take time to read the 30 pages of text referencing the EHCU Mod. It is interesting...

Hey Swede. Not much brake talk on the board, eh? I'm shopping for a set for my Ty and will let ya know when I score. You do same?

chrizbot and InvisiBill. I hate when I screw up. The above messages from me are for chrizbot. Guess I should get some sleep

Demand a pre and post alignment printout from whoever does your alignment: if the shop can't do that, I'd go elsewhere. See syty.org for stock and enhanced alignment specs.

Hey InvisiBill. Reference ball joints. The 92 GMC S/T Service Manual recommends supporting veh weight by lower control arm, mount dial indicator to "Lowest or highest outboard point on rim" and prying the wheel at top (0*) and bottom (180*) to look for horizontal (in-out) movement at upper and...

Hey Mike. Acording to my fine 1992 Jimmy-Sy-Ty shop and service manual series, our trucks have the same iddybiddy 10.5" rotors and 9.5" drums as any other GMC S/T vehicle, plus we have the 4 wheel anti-lock equipment which seems odd with the big tyre and tiny brake combo?? I'm in process of...

Thanks to all. I settled on Porterfield carbon - kevlar Pads and shoes, but am still shopping for upgrade front rotors. I've contacted via e-mail VetteBrakes and Baer, but no response yet. I'll keep ya posted.

Hey Tim. Not a relative that I know of (probably wouldn't talk to me anyway heathen that I am) but we are everywhere! Do say Hi to the gent for me. Most of my relatives are military families.

Hey ronniejoe80. Do you use the stock specs or the enhanced specs recommended by Mr. Chase? Gary & Ty1845.

Hey Tim. Reference your TCC questions. The switch allows the TCC to lock up immediately after shift to 2 nd (on my Ty), in effect causing a big bog on 1-2 shift. Use a wire to jump ALDL spots F to A (ground) to see if ya like it, then buy a switch.

Time for brake rebuild / upgrade. I want to use the stock calipers, drums, and rotor dimensions. I'm looking for hints and advice regards performance street pads and shoes, and performance rotors. Anybody using braided brake lines? PS: Be careful out there - the pics of wrecked Sy are...