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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 10, 2005
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Open Help Requests for GM
Help Request Answers
1992 Cadillac Seville 4.9L ride control VIN: 1G6KS53B6N
In effort to retreive error codes to determine cause of "Service Ride Control", I am unable to get a display of any error codes.
1995 Cadillac Seville SLS 4.6L Transaxle Speed Sensor Circuit Problem VIN: 1G6KS52Y1S
Hello, We have a nightmare of a car here, it is a 1995 Cadilac Seville 4.6L The car came in with the check engine light on intermittently, ran codes and it came up with PO56 code which is a Transaxle speed sensor circuit problem. We consulted with Cadilac tec...
1985 Chevrolet Cavalier 2.0L third gear VIN: 1G1JC69P9F
I had a customer whose car would stall upon down shift into first or when going into reverse. Several shops just wanted to replace his gearbox entirely. After some investigation I found corresponding tsb's and decided that a revised tcc solenoid and cleanout o...
1991 Chevrolet Cavalier RS 2.2L C. V. Shafts VIN: 1G1JC51G0L
This car has noise when in full lock steering position in both directions. Shafts are quiet and smooth when car is driven in strait line. Ocasional noise from shafts when vehicle is being parked even when shafts not at full lock.
1996 Chevrolet C1500 Suburban 5.7L Electrical system VIN: 3GNEC16R0T
Posting for another shop without internet connection. Vehicle came in with a problem of ALL lights flashing when vehicle is started. The headlights, parking lights, dash lights, dome lights, air bag, antilock brake and all warning lights flash as soon as key ...
1997 Chevrolet S10 2.2L cranks, no start VIN: 1GTCS1944V
truck drove in missfiring. customer complained of coolant loss prior. block checked bad immediately. head had multiple cracks. replaced it with reman. also replaced plugs and wires. on first attempt to start motor shook terribly and made popping/collision soun...
1997 Chevrolet Blazer 4.3L lock cylinder VIN: 1GNDT13W4V
This blazer has a tilt column and a floor shifter(automatic). We have a problem that is intermittent. The lock cylinder will not always return to the off position so we can remove the key. It appears to have a KEY RELEASE SOLNEOID OR THEFT DETERRENT LOCK SOLEN...
1998 Chevrolet Venture 3.4L cooling system leak VIN: 1GNDX03F9W
the customer has stated that they have to keep adding coolant to the system. about a gollon a month. i have done a pressure test to the system and have found no leaks to the outside of the enging or radiator. i am useing a air compressor testing system and hav...
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
Well this one has me stumped. Customer came in for an intake manifold gasket with oil in the coolant, apparently they had it checked at another shop because we didnt have to diagnose the leak. After the repair was finished the car ran great, but i noticed it s... Trouble codes: P0128 (Engine coolant temperature below thermostat regulating temperature)
2002 Chevrolet Express 2500 5.7L MIL Lamp on VIN: 1GCFG25R62
We replaced the computer in this van. Now it needs to have the CKP variation learned (code 1336). At this point we have an outdated Snap-On scanner. It has the relearn choice in the scanner but I have to lie about the year because we are updated to 2000 (van i... Trouble codes: 1336 (CKP system variation not learned)
1994 GMC Jimmy 4.3L No Start VIN: 1GKCT18WOR
Hi. This gmc has odd problem only after it has been warmed up. It will not restart, when shut down for about 20 min. Any time short then 20 min. it will restart After about 1 hour it will restart fine. When it restarts it runs great.There is no signal to the i...
1996 GMC C3500 HD 7.4L Excessive Emissions, Poor Idle Quality VIN: 1GBKC34J9T
This truck has a hard time starting, long crank times and has a slight misfire at idle. Exhaust smells really bad at idle but no smoke. This is one of our plow trucks and works fine plowing in 2nd gear at 25 mph. Truck has plenty of power at a higher rpm but r...
2000 GMC Safari SL 4.3L Rear Diff? VIN: 1GKEL19W9Y
This rig has a rhythmic drivetrain thump, thump, thump... that appears to be related to driveline speed. Its not real loud but bothers the owner. He will trade it off if the whole rear end needs overhaul so we though we would try to come up with a lesser dolla...
2001 GMC Jimmy SLE 4.3L poor fuel mileage VIN: 1GKDT13W81
Happy new year.We've got this 01 Jimmy 4x4 with a complaint of poor fuel mileage. Scan ECM and no codes stored in memory.Fuel pressure is OK and no leaks from the regulator. On a test drive with scanner hooked up, the only unusual thing I see is O2 sensor ,ban...
1999 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3NL52T4X
it will run good above idle , but at idle it misses, surges , pings and sometimes stall out . it acts like a huge vaccumm leak, but cant find any.it doesnt have a egr valve , so it cant be stuck.plugs are black ,like runninig rich. Trouble codes: 0180 (map sensor high)
1987 Pontiac Bonneville 3.8L Poor Idle Quality, Cuts out, Stall, Misfire
car loads up and wont clear out.checked for plugged exhaust,timing chain appears to be okay.most sensor readings appear to be okay.had a leaky injector and replaced that.checked the crank sensor and ign module and both appear to be working ok.runs very rich bu...
1996 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE52MXT
Posting this for one of my techs. This one came in last week with major coolant burn {head gasket(s) failed}. We replaced the engine along with the following components: radiator, coolant hoses, water pump, ignition control module, cam sensor, crank sensors (b...
1997 Pontiac Grand Am SE 2.4L timing chain
Please help, the quad four is killing me.We replaced the water pump with a new gmb.My tech failed to grasp the concept of having it in time when removing the water pump.Needless to say when he started it up it had that uneven lope of an out of time engine.We t...
2000 Pontiac Grand Am GT 3.4L stereo VIN: 1G2NW52E7Y
disconnected battery while theft lock was engaged. Re-connected battery and now the radio says Lock. Called GM dealership said to hold 2 and 3 then write down 3 digit code, then hit am/fm button and get second 3 digit code. We tried that and cannot get the sec...
1996 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK527XT
I'm looking at this Saturn with MIL on for a friend. It seemed easy enough at first: appears to need an EGR valve. Thought I'd look at signal from cam sensor but find none. Dealer parts man says this car does not use a cam sensor and this code generally indica... Trouble codes: P0341, P0404
1997 Saturn SC2 1.9L cooling system VIN: 1G8ZG1271V
When it gets 10 degrees F. and lower, motor never generates enough heat to get motor up to operating temp. Inside car driving down road the temp from heater duct drops gradually. Checked thermostat and it never opens, hose is cold. Checked for combustion chamb...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac DeVille 4.5L ignition VIN: 1G6CD5337L
thanks to everyone for the great advice.the problem turned out to be the nuetral switch bolts had backed out and was alowing the switch to move and thats why when you moved the shifter sometimes it would crank.sometimes not.but anyway that was the problem.than...
1996 Chevrolet Camaro 5.7L L.F speed sensor VIN: FG5RT76774
Norman and Bob were correct. We ran #7 plug wire right on top of sensor wires and likely induced some electrical noise into ABS module via lf sensor wiring. We would have thought with that going on you would see the l.f sensor showing 480 mph with all others a...
1998 Chevrolet K1500 Cheyenne 5.7L Poor performance VIN: 1GCEK19R7W
Many of the replies I recieved said to recheck fuel pressure and volume. Fuel pressure and volume appeared to be correct. I still suspected fuel pressure so I borrowed another shops pressure gauge. My gauge was reads 6#'s higher than there gauge. I replaced th...
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK23192
Thanks for all of the replies, and after thinking about the problem over the weekend I came to the same conclusion that the BCM and the ECM had not communicated the password for the pass key system. PErforming a relearn of the passkey system solved the problem... Trouble codes: P1631 (Theft deterrent fuel enable signal not correct).
1995 GMC Yukon SLE 5.7L No Start VIN: 1GKEK13K0S
First, thanks to all who replied to my post. While I had already tried most of the suggestions, it made me focus on the basics. I had been replacing the failed pumps with a new GM 'module' which really gave me no opportunity to examine the failed pump because ...
2000 GMC Savana 3500 5.7L starter VIN: 1GTHG35R0Y
thanks everyone for you help. problem is fixed. found problem to be with a shorted neutral safety switch. after replacing it vehicle no longer had the problem
2002 GMC Envoy SLE 4.2L Windows, Door Lock VIN: 1GKDT13S12
Well the fix was another Passenger Door Module! The 1st. one must have been a defective! I tripled checked all wires for opens, power & grounds ect. Installed new module & programmed it. Everything is working! Thanks to all who helped in replies & to iATN! IAT...
1994 Oldsmobile Cutlass Ciera 3.1L Stall VIN: 1G3AG53MOR
Thanks for the sugestions.I unpluged the torque and tryed blocking the egr as some sugessted.Did a complete check of previous work.Cust did not want to go any further at this time. If she returns i will update.Thanks again this is a great system
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