GM Automotive Technicians Technical Discussion and Fixes for Sep 16, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1992 Buick Regal Gran Sport 3.8L Poor Idle Quality, Cuts out, Misfire VIN: 2G4WF14L5N hello, we have a buick that runs great when cold, but when it,s fully warmed up,the engine misfires ,idle is terrible the misfire is most noticable at 40-50 mph after converter lockup. engine has new plugs and wires (a/cplugs) compression is 125psi.the scan to...	View
	1989 Chevrolet Beretta 2.8L Poor Idle Quality, Stall VIN: 1G1LV11W6K this car came to shop with an irratic idle.when started, the car will rev up to 2500 rpm and stay there. it doesn't matter hot or cold. i replaced the iac and did a relearn on it. it leaves the shop and is good for a day or 2, then it is right back with the sa...	View
	1995 Chevrolet C1500 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GCEK14KOS Chevy guys help!!! we've had this truck for about a month and are unable to nail anything down. Mostly after hot soak, when under load such as turning to lock position and and a/c opperation, the truck stalls out. Also when slowing down coming to a stop it stu...	View
	1997 Chevrolet Cavalier Z24 2.4L Poor Idle Quality, Misfire VIN: 1G1JF12T6V hello all, The vehicle runs just fine 99% of the time. It only seems to act up after its been running 2 or 3 minutes(cold). The engine begins to run rough and gets worse until it almost stalls. It will only run bad for a few seconds, Then it clears out and r...	View
	1997 Chevrolet p chassis 454CID engine VIN: 1GBLP37J4V Hello group, Rental R.V, ran out of oil, I need to R&R motor (bb chevy) any one know a good way to pull this engine? Anyone have a labor time on this? As always any help would be appreciated.	View
	1999 Chevrolet Astro 4.3L vent control VIN: 1GBDM19W6X I am trying to find a R&R procedure for the vent control valve inside the dash. Mitchell doesn't show a location or procedure for this van. If someone with alldata, chilton, or even a GM service manual could look for me, I would appreciate it.	View
	2002 Chevrolet Corvette 5.7L accesory belt Alright vette guys I need some help. It’s a 2002 ZO6 that was sent to Lingenfelter and they, lets say, "hooked it up". It had a super charger added, head work, cam work, pistons, crank, etc... the problem that we are having now, is that the belt won't stay on....	View
	1991 Geo Metro 1.0L Valve Body VIN: 2C1MR66M67 Hello everyone and thanks for the help on this one. I have this Metro of my own that I have the automatic apart in. I took the valve body apart to have a peek and most of the check balls have actually almost tore through there place in the aluminum passage an...	View
	1999 GMC Sierra 1500 SL 5.3L Brake Pedal VIN: 1GTEC19T8X Hi IATN Group, My customer states that at times the brake pedal goes to the floor and she hears clicking noise from under left front area of vehicle. The master cylinder has been replaced with a factory unit and the brakes are OK. There are no ABS codes stored...	View
	1998 Oldsmobile Silhouette Premiere 3.4L Power sliding door VIN: 1GHDX03E0W The psd will close coreectly 5 out 10 times. The other times it goes to the close position and then basck to the open position. We have cleaned and relubed the track. We ran the diagnostic test and came with code 12 which is no problem detected. We also scuffe...	View
	1998 Other GM VT 3.8L Starting Hi This Vt has a problem that when the owner starts the car it will start and run for app 10 seconds and then stop it will start up again no problems and run without any problems.I have scanned the ecu only code I get is low speed fan problem however the fans ...	View
	1997 Pontiac Bonneville SE 3.8L Cuts out, Stall customer complain of dying in inter sections but restarting easy. now dies driving straight. customer claimes having the a/c off it doesn't die?	View
	2002 Pontiac Grand Am SE 2.2L No Start VIN: 1G2NE52F82 Has good fuel PSI But no spark. showes RPM on scantool as you spin it over	View
	1996 Saturn SC2 1.9L MIL Lamp on VIN: 1G8ZG1270T hi guys. i've got this 1996 saturn that was not properly maintaned, so we gave it everything to get it back up to be a safe car again. after tuning it up and addressing the cooling system, the brakes, the tires,changed the oil, new battery, alternator,serpenti...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1996 Buick Regal 3.1L Calipers/Pads I would like to thank all that replied to my request on their experiences they had with the rear caliper slide problems on GM w-body cars. The reason I asked for help, was that the customer we had was a lawyer! He was told from 'his mechanic' that we had stole...	20
	1966 Cadillac Deville/conv 429CID vacumn controls I would like to thank those who responded to my request for diagrams on this caddy.Thanks to John Miller @ The Air Shop in Santa Ana,Ca.for the fax he sent w/copies of the diagrams & test procedures.Thanks to Steve in Arizona for the website & phone # for www....	5
	1997 Cadillac DeVille 4.6L anti-theft VIN: 1G6KD54Y9V Well it's fixed. I think all you guys were right on the money. When I removed lock cylinder found one of the wires was broken, don't know if I finished it off when I pulled it out, but I put the new cylinder in and cleared codes, problem gone, yeah! Thanks to ...	13
	1990 Chevrolet K1500 Cheyenne 5.7L Hesitation, Low power VIN: 1GCDK14KXL Thanks for all the help on this one, it is finally fixed!!! Sorry it took so long to close, this was one I was working on night at a friends shop. Alot of people said to check the dist. mail shaft magnet for crackes. I checked and found that the magnet was cra...	9
	1993 Chevrolet Caprice Classic LS 5.0L No Start, Cuts out VIN: 1G1BN53E7P hey guys thanks for all your help it was the module i changed it out and solved my problem i thank yous again and have a good day	7
	1994 Chevrolet C3500 5.7L MIL Lamp on, no communication VIN: 1GCGC34K7R Thanks for all the replies, Laneard and Ken were both correct, The PROM was in fact bad, truck would not run w/o prom, but would run with bad prom??? New prom installed , cel out and trans shifts now, however the speedo is inop...possibly burned out the DRAC.....	7
	1999 Chevrolet Tahoe 5.7L entire power loss I would like to thank all eleven people who replied, the problem was internal in the battery. I have never seen this problem before. most responses pointed to thebattery and/or terminals.I unbolted the terminals and inspected them, they were in perfect conditi...	11
	2001 Chevrolet Tahoe 5.3L keyless entry VIN: 1GNEK13TX1 decided to replace the fob receiver, retested, works fine, wait 2, 5 and 14 hours and worked fine each time tried. p/n [...] thanks to all those that replied.	5
	2001 Chevrolet Silverado 2500 6.0L gauges and cluster VIN: 1GCHK29U91 found it. luckly i was able to completely confirm it. i got my other 01 hd and pulled that cluster out and swapped them to see the difference. sure enough that cluster did the same in my good truck and my good truck cluster worked fine in the bad truck. thanks...	8
	2002 Chevrolet Trailblazer LS 4.2L No Start VIN: 1GNDT13S92 First of all, thanks to all who responded. I had several that suggested an ignition problem, but that tested fine. A special thanks to Paul [...] for a test on throttle body, turn off ign for 15 secs, turn sw on w/eng off, don't touch pedal for 20 secs, indic... Trouble codes: 1523 (elec. throttle cntrl throttle return), 1515 (elec throttle sys vs throttle pos), 1516 (elec throttle mod vs throttle pos).	7
	1999 GMC Yukon SLE 5.7L suspension VIN: IGKEK13R5X thanks for all the replies had 10 of them. we made it alot better by redoing the alignment and lowering the torsion bars to make the the vehicle more level it looked like it was higher in the front like it was loaded in the back this is what several members to...	11
	1997 Saturn SL1 1.9L compression VIN: 1G8ZH5280V We pulled front cover off motor and found all the timing chain tensioners wiped out which caused timing chain to jump and then caused engine to bend all intake valves. Owner is now thinking about what to do with car.	13

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