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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 1, 2007
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1991 Cadillac Allante 4.5L Trunk lock VIN: 1G6VS3386M
With all the trunk latch/lock related components unplugged. With the exception of the trunk lock cylinder switch. What would be the cause of the drain? Why does the drain clear with the trunk cylinder switch. The drain reappears after cycling the key and entry...
1997 Cadillac DeVille 4.6L No Start VIN: 166KD5ZY5V
I'm playin clean-up batter on this one. The other tech checked codes, replaced all in related repairs. I reset anti-theft, due to battery being replaced and cleaned grounds and powers. The cranks and runs for 3 seconds and dies and will do the same many times.... Trouble codes: P1626 (Anti-theft system fuel enable circuit), P1599 (CC power management mode or engine stall), P1381 (Cylinder misfire-ABS/PCM signal data), P0603 (PCM keep alive memory error/reset), P0300 (Random misfire)
1997 Cadillac Seville SLS 4.6L Electronic VIN: 1G6KS52YSV
hi guys got a 97 sls autoclimate going down road w/ac on high blows cold but swotches between dash vents & defroster all by it self any one seen this before thanks john d
1974 Chevrolet Corvette 7.4L Start up and shut down
Hey Guys thanks for reading this email. The problem I have with this car is when you start the car there is no power to distributor on the battery wire.When you release the key slightly, the engine will come to life.I have tried a new ignition switch to no ava...
1991 Chevrolet Astro CL 4.3L Stall, stall after start VIN: 1GNDM19Z2M
Vehicle stalls intermittently, and feels like you just shut it off with a switch. Fuel pressure remains good while this is happening. Restarts right away. After vehicle gets warm, it happens less often.
1998 Chevrolet Blazer 4.3L Cuts out, MIL Lamp on, SPARK KNOCK VIN: 1GNDT13W8W
i have at t10 blazer that very intermmittantly will start misfiring,low on power and severe spark knock.check engine light will come on and set codes 339 & 341.problem is very intermmittant customer drove on a 900 mile round trip and problem never occured but ... Trouble codes: 339 (ckp sensor), 341 (cmp sensor)
1999 Chevrolet Cavalier 2.4L clutch petal VIN: 1G1JF12TOX
thanks in advace . this vehicle came to us requiring a clutch assembly & rebuilt the 5 spd transmission . we replaced the trany & clutch assembly ,includes a new slave cylinder . we are having difficulty getting a clutch petal . we have tried varous methods o...
2005 Chevrolet Silverado 1500 4.8L engine VIN: 2GCEC19V05
This noise is a squeaking at idle that turns into a ticking at 1500 rpm and above. It sounds like an old chevy with a fuel pump that needed oil. We have checked flywheel for cracks. None found. Sounds loudest right at timing chain cover. We pulled pan and cove...
1999 GMC K1500 Sierra SLE 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTEK19R1X
Please Help!!! I have worked on this vehicle 3 times now for the same complaint. When the vehicle first came in it had been at three other shops.The customer told me that the vehicle had been tuned up, had the intake gasket replaced, a new fuel filter, an inje... Trouble codes: P0300, P0305, P0154, P1153 (HO2 sensor insufficient switching Bank2 Sensor1), P0151
2000 GMC Jimmy SLE 4.3L brake lights VIN: 1GKCS13W2Y
i am thinking the multifunction switch is the culprit but would like to know for sure before replacing. thanks in advance. jay
2002 GMC Sierra 2500 HD 6.0L fuel tank VIN: 1GTHK29U22
Truck is fixing to have it's 3rd fuel tank. The 1st one was replaced by the dealer. It was cracked. Now this one is cracked a couple years later. Does someone know of a condition causing this problem. Thanks for your help.
2000 Oldsmobile Bravada 4.3L engine VIN: 1GHDT13W0Y
Hello all, have been away from IATN for a long time (3 yrs) due to a sick daughter who required constant medical attention, hence the "Below average" rating, however I intend to be back on track now. This Bravada has a "ticking" noise @ idle, starts about 2-3 ...
2002 Pontiac Grand Prix SE 3.1L ignition cylinder VIN: 1G2WK52J92
hello all this car came in from a used car lot for not being able to turn off the key far enough to remove the key. It will turn off the engine but you can`t remove the key did multiple voltage checks at the columm don`t see anything abnormal just wondering if...
2000 Saturn SC1 1.9L pcm not engaging a/c clutch
hey please help me with this. i have a 2000 saturn that the pcm is not grounding the gray wire to the a/c relay so that the clutch can engage. The scan tool says no a/c request under engine managment data. however under the body data it says yes on a/c request...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Limited 3.8L Surge, Cuts out, Stall VIN: 1G4HR52L8R
Thanks for all the help guys I in fact checked the ignition module it was a bit faulty. I changed it and the customer has been satisfied with the result cause its not turning off anymore. Trouble codes: 321 (no 18x ignition pulses), 361 (est line not toggling ic wire).
1995 Buick LeSabre Custom 3.8L rear springs VIN: 1G4HP52L5S
What I did was order all new hardware and adjuster kits from the dealer. i hope this will fix this for good. Thank you to the people who replied i really appreciate it.
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
The cat converter was the problem. It was plugged. We checked the back pressure and it was definately too high. Replaced the cat and ran like new. Thanks. Trouble codes: P0300.
2003 Buick LeSabre Limited 3.8L Tilt VIN: 1G4HR54K63
Well, as usual, you guys are the key to fixing cars. I couldn't get the tilt on this to unlock by pushing up with my legs, but when I pulled hard on it and worked the lever it came free. It was stuck in the full upright position, but working fine now! Thanks f...
2004 Buick Rainier CXL 4.2L transfer case VIN: 5GADT13S44
Hi guys, this one was simply low air in the tires Ted hit it right on the head. thanks for all the replies on this it really helps to know someone been there and has answers. thanks.phyllis
1997 Cadillac Eldorado ETC 4.6L Dash,Instrument cluster VIN: 1G6ET1293V
This one is fixed. We pulled the wire harness out from eng. bay, under carpet in trunk and cleaned all the rest of the hidden grounds,disconected body control moduel,air bag moduel,PCM,ABS and reinstalled everything and problems gone. The customer is happy. Wh...
1997 Cadillac Catera 3.0L Engine VIN: W06VR52RGV
This was all a timing problem. I had the marks dead on every time I had the timing cover off, and compression was good. So it was hard to believe that timing was off, but it was. I had both cam gears on the affected side 180 degrees off, because how the dealer...
2001 Cadillac Seville SLS 4.6L No power VIN: 1FAFP33P91
The power was drained. I recharged the battery and was back up and running. Thanks for the help fellas!!
1995 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 1GCEK14K7S
It turned out the aftermarket EGR valve was the problem - replaced valve and all is OK. I just never thought it should be trying to open the EGR just off idle in park or drive, but I guess thats normal. Thanks for the help.
1997 Chevrolet Camaro Z28 5.7L seal oi leak VIN: 2G1FP22PXV
hello,techs thanks everyone.Mac tools sell lots of special tools for LT1.the one I need cost $105 plus tax.I don't want to buy it,my boss don't want to buy it for the shop so I ask him to install the seal.He put lots of petroleum gel and shove it in,so far no ...
1998 Chevrolet C1500 Cheyenne 5.7L master cylinder VIN: 2GCEC19RXW
1999 Chevrolet Venture 3.4L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDX03E1X
Many thanks to all who replied!Turns out that cylinder head gasket blew on cyl.#2.No warning,nothing.Never overheated.Pressure tested cooling system and coolant filled cyl.#2,.Injector does not leak.Will retest injector when finished with head gaskets{fun}.I a... Trouble codes: P0302, P0300 (random cylinder misfire).
1999 Chevrolet Express 2500 5.7L Hesitation VIN: 1GAGG25R8X
sorry for taking so long to reply, we were waiting to see if customer returned. we didnt have a fuel injection cleaning kit, until now, we used it on the van, then road tested, ran down e-way, accelerates OK, it does hold fuel pressure now after key on engine... Trouble codes: P0101, P0172, P0175, P0131, P0137, P0151.
1997 Geo Metro LSi 1.3L No Start, Cuts out VIN: 2C1MR5295V
Thank you all you guys, I finally put another ECU to fix the problem.
1994 Oldsmobile 98 Regency 3.8L Poor Idle Quality, Very fast idle VIN: 1G3CX52L6R
2000 Oldsmobile Intrigue GL 3.5L Cooling Systems VIN: 3B7KF23479
Replaced customer's aftermarket thermo with revised OE, works like a champ. Thanks to everyone who replied.
2001 Oldsmobile Alero GL 2.4L Accessories VIN: 1G3NL12T31
I took Jerry from Mich advice and tryed a new ign sw but that didn't work, cust was acting a little flakey so I reassembled the car and shiped it down the road. Thanks to everyone who replied. I think that was more than I wanted to chew-on right now ONCE AGA...
2003 Oldsmobile Alero GL 3.4L MIL Lamp on VIN: 1G3NL52E93
Thanks to Andy,Chuck,and Terry for your help. Car went back to the dealer,it had 5/60000 warranty. Dealer replaced the ign. switch. Trouble codes: U1040 (ebcm), U1088 (sdm), C1298.
2000 Pontiac Bonneville SE 3.8L Speedo, Tach, turn signal indicators VIN: 1G2HX54K3Y
Well guys this one is out the door. I changed gears a little and started testing the turn signal switch. I found that the turn signal switch was lacking power on the pink wire from Ign.1 fuse#12 in rear fuse box under the rear seat. The fuse was good but no po...
2001 Pontiac Grand Prix GT 3.8L Cuts out VIN: 1G2WP52K71
Well, the vehicle is fixed, thanks you all for your inputs. IATN's members: We've always pulled through, every single idea for the fix was on the right direction; it's my bad not included all of the details what I've checked. MAF, CKP, VATS( included ignition ...
2002 Pontiac Grand Am SE 2.2L no crank VIN: 1G2NE52F72
thanks to all who responed. this 02 grand am was getting to be a real problem and after 2 passlock sensors and one bcm the problem was so intermittent, 3months would pass before problem would return. customer asked about bypassing it. so thats what we tried, w...
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