GM Automotive Technicians Technical Discussion and Fixes for Jan 7, 2009 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1990 Buick Electra Park Avenue 3.8L Blower motor, VIN: 1G4CW54C4L 2 volts on purple, good ground. 2 volts before fusible link,with blower disconnected. Any help would be welcome.	View
	1990 Chevrolet Lumina Euro 3.1L Stall VIN: 2G1WN54T8L Customer states that only on rainy/damp/moist day the vehicle will die as soon as it's put into gear. Vehicle will always restart but then almost immediately die again. As soon as the weather clears, vehicle starts & runs okay. He also states that the vehicle ...	View
	1994 Chevrolet g30 5.7L Poor Idle Quality VIN: 1GBJH32K9R This is a box truck or cutaway, the problem is no fast idle when cold, and being around Chicago area and 0 temps its rough sitting on the pedal for 20 minutes. After the motor gets some heat it runs good and idles fine. The motor is about a 2 year old rebuilt....	View
	1996 Chevrolet Lumina 3.1L Stall VIN: 2G1WL52M1T Hi all: I'm stumped on this one and need some help. I'm hoping someone out there has come across the same problem in the past. This car was towed in with a start and immediate stall. So it cranks fine, engine starts for two to three seconds then stalls (eve...	View
	1996 Chevrolet K3500 6.5L No Start VIN: 1GCHK33F9T the truck was towed in as a no start and customer states that the truck had been fine untill one morning it just would no start. on scanning the computer system we see no rpm on the pid for rpm it stays 0. we have replace the crank sensor and still no start. w...	View
	1997 Chevrolet K2500 Cheyenne 5.7L drivetrain VIN: 1GCGK29R1V This 4X4 came in just after we had a large snowstorm and the customer told us he put his truck in 4wd and the right front independent axle assm. popped out. We tore the intermediate axle assm. and housing off the front and found the retainer clip was laying in...	View
	1998 Chevrolet Malibu LS 3.1L high idle VIN: 1G1NE52M4W i have this 98 malibu with a high idle usually aroung 1400 rpm in neutral i have changed the iac and still get high idle, checked for vac leaks none found paid special to check for intake leak none found. thottle angle stays between 0/2. cleaned out iac passag...	View
	1999 Chevrolet Monte Carlo LS 3.1L Hesitation, Cuts out, Stall VIN: 2G1WW12M3X I hope someone can piont me in the right direction here. Car came in with a complaint of a severe hesitation from a stop and dies out once in a while while making left hard left turns. Took out for test drive and felt the hesitation, but not all the time. felt...	View
	2001 Chevrolet Express 3500 5.7L Stall VIN: 1GAHG39R51 This is a CNG dual-fuel full-size van. As best as I can tell the CNG system on these vans is added by an aftermarket company before GM sold the van - so it is a semi-official CNG setup. The problem is that when the van runs out of Natural Gas it likes to stum...	View
	1998 GMC Sonoma SL 2.2L MIL Lamp on VIN: 1GTCS1447W Hi all, Thanks for your help in advance. This truck came in with the Check Eng ligh on. Upon testing, I found no communication to the scanner, either in data mode or code mode. I checked the power and grounds to the PCM and found them to be good. Thus the orde...	View
	2000 GMC Savana 2500 5.7L No Start VIN: 1GTFG29R3Y Hey all you GM techs out there, this one is killing me. The car was originally towed in because the car wouldn't start so the customer turned the starter so much that it burnt it out. So we thought it was pretty cut and dry, put in a new starter and it should ... Trouble codes: P1626	View
	1985 Oldsmobile 98 Regency 3.8L MIL Lamp on, V REF VIN: 1G3CX6937F This vehicle is a basket case. I have had so many different problems I am willing to shoot the dang thing. The latest round of problems is like this. After driving for a bit the customer will stop for gas or something and it would set about 15-30 min. and when...	View
	1997 Oldsmobile Achieva S 2.4L alternator VIN: 1G3NL12T2V This is my boss's kid's car and we don't see to many cars here. This vehicle came in with a charge lamp on and the alternator not charging. All fuses check out ok, power and grounds to PCM ok, and connections look ok. Battery wire at the Alternator is ok, load...	View
	1997 Pontiac Grand Prix GTP 3.8L Excessive Emissions, No Start VIN: 1G2WP1210V Car came in for rough running and no start at times. PCV system was repaired and car road test okay. After hot soak would not start and flooding badly. Tried new crank sensor and different PCM. is overfueling when will not start. have actually had it running w...	View
	2001 Pontiac Bonneville SE 3.8L Excessive Emissions, Stall, HARD RESTART VIN: 1G2HX54K81 we have put a new ignition control module on with no luck. we put module on because of strange signal from icm to pcm the crank signal was not right. the module made the signal good but didnt fix the dying problem. all other sensors are working like they shoul... Trouble codes: P0172, P0404, P0620	View
	2003 Saturn L200 2.2L MIL Lamp on VIN: 1G8JU54F73 Hi everyone and Saturn Techs in perticular, We have an 03 Saturn L200 in the shop, it came in with an ses light on and "sounded loud". First obvious problem is the cooling fans on high when ever car is running. Started and stalled twice from cold. Scanned PCM... Trouble codes: P0171, P1599	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2003 Cadillac Escalade 6.0L Stall VIN: 1GYEK63N53 Thank you to the 5 that responded to this request for help. Kevin from Minn explained it best by saying that the throttle angle is adjusted during normal driving life to account for carbon build up on throttle body and plate. When PCM is reset or there is low ...	5
	2000 Chevrolet Cavalier 2.4L radio VIN: 1G1JF52TOY david from indiana was correct, a friend of mine has a tech 2 didthe relearn in about 2 min, all the other advise was appreciated but none of them worked thank u all for ur time ,Jim	17
	2008 Chevrolet Silverado 2500 HD WT 6.6L park assist VIN: 1GCHK23618 Thanks to those that came to my aid. Removing the park assist fuse shut the system down, hadn't tried this figuring the way everything is intergrated these days, thought it would throw codes and buzzers. The instrument cluster stores a no communication code, b...	5
	1987 Oldsmobile Delta 88 Royale Brougham 3.8L No Start VIN: 1G3HY5437H Thanks to all who replied.. and a thank you very much to john from new jersey who was completely on the money the fix endend up being the top gear was out of time , altough the magnet was still there. again a big thanks to all this beast was picked up and fin...	13
	2000 Oldsmobile Intrigue GL 3.5L Controls VIN: 1G3WS52H3Y Replaced passenger side blend door actuator to repair. Thanks to all replies.	4
	2000 Pontiac Grand Prix GT 3.8L Upper Plenum VIN: 1G2WP52K6Y Hello Again, What i ended up doing was pulling the plenum back off and not finding any problems with the gasket or plenum. I did find a piece of the old plenum that had broke off in the lower manifold below where the PCV is located. At this point I decided to ...	14
	2002 Pontiac Firebird 3.8L No Start VIN: 2G2FS22K62 we fixed car. we knew it was the pump are real question was about if rear end had to be dropped to get tank down. This car has plastic fuel tank and we did not have to take rear end down. lowered muffler, removed track bar from pass side and r...	11

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