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Prev Professional Automotive Repair Technical Discussions for October 14, 2004
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Open Help Requests for GM
Help Request Answers
1993 Buick Century Custom 3.3L pwr door locks VIN: 1G4AG53NOP
Intermittant heavy parasitic drain on battery as well as inoperative power door locks, and rear window defogger. When installing new battery noticed a huge spark when connecting terminals. Amperage draw was so large it blew meter's 10 amp fuse. Pulled a number...
1988 Cadillac DeVille 4.5L system VIN: 1G6CD5159J
original problem -- a/c system shuts off and blend doors not working. replaced orifice tube and recharged a/c system. found leak in compressor. after replacing above parts except for bcm and programmer, a/c shuts off after driving. replaced bcm and didn't shut...
1991 Chevrolet LLV Grumman 2.5L Stall VIN: 1GBCS10A0M
Once this vehicle is fully warmed up it will stall when you shift it from park to a driving dear, forward or reverse. I have tried alot of parts as you can see. I have monitored the IAC values on this truck and the IAC does go up when the vehicle is shifted, b...
1999 Chevrolet S10 LS 4.3L No Start VIN: 1GCCS19X8X
Get ready to scratch your head. This truck was towed in with a no start problem. Check fuel pressure, spark, and injector pulse. There was no fuel pressure, and 12 volts to the pump. I know the fuel pump was bad the first time when I replaced it, as the pump w...
2000 Chevrolet Silverado 1500 4.8L Hard Start VIN: 1GCEK14V2Y
Greetings fellow technicians, This is a normal duty truck. It starts fine cold, runs well and the owner has just this one complaint. That is, when the vehicle is brought up to operating temperature, then shut off, it has a very long, drawn out crank and exhib...
2000 Chevrolet Silverado 1500 4.8L Poor Fuel Economy VIN: 2GCEC19V3Y
I have a Sivlerado with a 4" lift and 265/75r16 tires. The owner says his mpg has dropped from 21 to 13 since towing a boat down from northern California. The truck runs great and seems to have good power. The trany is not slipping. There are no codes. Specs f...
2002 Chevrolet Corvette Z06 5.7L Pedal height VIN: 1G1YY12S92
This Vette suffers from a decreasing height of brake pedal over approximately a 2 week period. Dealer has attempted repair, but had less success and made less headway than we have made. We have verified lower pedal height and slightly spongy pedal and replaced...
1996 Geo Metro LSi 1.3L bucking VIN: 2C1MR5294T
Just moved to an independent after years as a line tech. I agreed to swap trans as vehicle was hanging in bay. Engine was swapped by another tech several hundred miles ago and ran OK. Vehicle returned to me with cracked flexplate, customer supplied transmissio... Trouble codes: P0505 (Isc)
1989 Oldsmobile Cutlass Ciera SL 3.3L No Start, Poor Idle Quality, Cuts out, Stall VIN: 2G3AM51N7K
THIS CAR HAS BEEN A PROBLEM CHILD FOR A WHILE NOW. Car will not start unless you throttle it, then will run okay. As soon as you put it into gear it will die unless you 2 foot it, and keep it at about 1250 rpm. Customer tried to fix it on his own. He cleaned t...
1999 Oldsmobile Intrigue GL 3.8L instrument cluster VIN: 1G3WS52K3W
hello, i've got this olds intrigue that has all kinds of bizzare things going on in the instrument cluster. when the ignition is placed in the on position, running or not, 1) the temperature gauge goes almost all the way to hot (seems to move towards the mid...
1993 Pontiac Firebird Formula 5.7L remote door lock VIN: 2G2FV22P6P
i posted this car as a fix thinking i would have no trouble programing the remotes but guess what i was wrong i grounded pin g at the aldl then turned the key on with no response from the locks is their any other procedure or is their trouble with the system t...
1997 Pontiac Grand Prix GT 3.8L ABS Warning Light VIN: 1G2WP52K7V
After replacing a leaking steering rack assembly on this 97' Grand Prix with a AC/Delco rebuilt unit, the ABS light came on and off intermittently a couple of times during the road test and now stays on all the time. At first I hadn't adjusted the toe-in when ...
2000 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB1244Y
Greetings, I am hoping to get some leads before I go ripping into this tomorrow.I have a nostart condition on this vehicle. Cranks fine,fuel pressure good,no spark,and injector pulse on cylinders # 2+3 only.I have B+ at all injectors.Also cranking rpm on scan...
2002 Pontiac Grand Am GT 3.4L Lighting VIN: 1G2NV52E82
Morning Gents, I have this Grand-am that irratically clicks from behind the emergency flasher switch--center of dash. If you press in the emerg. flasher a tad it will quit..but the turn signal refuses to operate then. Is this a common problem? Turn signal or e...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L Harsh Cold Engagement VIN: IG4GD2217S
Much thanks to all of the members who replied; the several responses who suspected modulator problems were right on the money. While checking modulator operation, we found that the vacuum to the modulator was low; eventually the problem was traced to a deterio...
1995 Chevrolet C1500 Suburban 5.7L a/c compressor VIN: 1GNEC16K6S
Thanks for the help guys, now can you help me find my ass. Recap: Cus.has reminded me that first compressor was not noisy, but was leaking. Cus. came in requesting a/c comp. Gave him a great price since he is a good customer. Couldn't get accumulator loose fro...
1996 Chevrolet K2500 Suburban LS 7.4L transfer case VIN: 3GNGK26J2T
Well Stephens from New Mexico hit it on the head there was a bolt loose in the tranfer case mount. If you looked at it it didn't look as if was moving. I put a wrench on it and it turned about 2 turns. Thanks a million I was getting ready to pull the transfer ...
2000 Chevrolet Astro 4.3L Drivers power window VIN: 1GNEL19W1Y
Thanks guys, the window motor was the fix.Got 13 replies which greatly helped my confidence in selling to the customer. I was hung up on the main circut breaker not opening when the drivers window would not work, not thinking each motor had a circut breaker al...
2001 Chevrolet Suburban 2500 8.1L coolant VIN: 3GNGK26GX1
ok guys, thanks for the help heres what the deal is. coolant doesn't flow thru the intake manifold at all. this truck had a bad head gasket that was leaking coolant into the oil. there was no evidence of coolant in the oil when draining it or looking at the di...
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GTHC23132
Hi ladies and gentleman,thank you all very much for infos, after check fuel return as you guys suggest,we found a lot of fuel from engine return line even no fuel pressure built up,call local dealer to inquire the problem,they said the problem is injectors tha...
1955 GMC truck 307CID Firing Order
I would like to thank all those who responded to my request. Several people mentioned that they do not show a 307 but do show a 302. I was just going by the information that the customer provided. Since all we have is the engine we have to depend on the custom...
1997 GMC Jimmy SL 4.3L Speed o VIN: 1GKDT13W0V
Well folks I appoligize for the long delay we were waiting to hear from the customer and also awating a computer. I want to thank you for your replies and tell you that we did not fix this vehicle but did discover the cause after replacing the PCM and finding ...
1999 Oldsmobile Cutlass GL 3.1L Unknown VIN: 1G1FUEDGTX
Sorry for the long delay- all the gm techs were correct in telling me about the link lead to the air intake sensor. I cant believe this caused the trans to act up. Thanks again.
2000 Oldsmobile Alero GL 2.4L Misfire VIN: 1GNL12TXYC
The insulators that we had just put on from GM were defective. The mornign after it returned to the shop, I started it up and heard a clicking under the hood. I looked into the valley under the cover and saw them arcing. I replaced the insulators and the coil ...
1990 Pontiac Grand Am LE 2.3L Excessive Emissions, Poor Idle Quality VIN: 1G2NE54DXL
I want to thank everybody that responded. The general conclusion from all sources I asked is that a cat would fix the car. I am still waiting for the customer to have one put on.
1998 Pontiac Trans Sport Montana 3.4L ABS Module VIN: 1GMDU03E5W
Well Thanks to Dennis from Newfoundland, The problem is fixed.The pass through connecter in the floor behind the driver's seat was all green inside.Repinned it and no more problems.The segments in the radio are just going bad.I want to thank everbody that resp...
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