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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 6, 2005
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1990 Buick Century Limited 3.3L Poor Idle Quality, VIN: 1G4AL54N0L
engine is surging at an idle and the ac clutch is trying to engage when all controls are turned off any ideas?
1968 Cadillac coupe de vil 472CID horn
Sorry for no VIN but they didn't have them in '68. Horn is inop, no power at horn button, horns blow if hot-wired. I'm hoping that someone can tell me where the horn relay is located. Sure hope there's somebody that old out there... Thanks in advance for any ...
1976 Cadillac Fleetwood 60 Special Brougham 8.2L load levelers VIN: 6B69560310
Hello and thanks in advance for the help on this one. I have this low mileaged Caddy in with inoperative rear air shocks. I have located what i believe to be the compressor under the hood. It appears to be an engine vacuum operated unit and i cannot see that ...
1996 Chevrolet Blazer 4.3L tcc VIN: 1GNDT13W7T
This Blazer Has a intermitant Tcc no comand on from pcm. If I run it on the hoist It will comand on every time over 45mph. Go drive it on the road and sometime it will lock up somtime it won't. If I comand on with tech2 it will lock. and stay locked untill I c...
1997 Chevrolet Malibu 3.1L No Start, Poor Idle Quality, Cuts out, Stall VIN: IGINDS2M4V
Car came in on tow with a no start condition, Its from a used car lot so who knows what the history on it is. It cranks good and tries to start.Sometimes it runs but poorly.It will idle poorly and if u try to move the trottle it chugs and bucks like its not ge... Trouble codes: P0336
1998 Chevrolet Express 3500 5.7L No Start, Stall, Misfire VIN: 1GCH635R6W
This van came in as a no start. Diagnosed, pulled ignition distributor and had distributor gear teeth ground off. Checked distributor and cam gear also oil pump, really could not find anything wrong. Gave back to customer after a used distributor installation,...
1998 Chevrolet Astro 4.3L Mechanical VIN: 1GNEL19W3W
Hello there fellow techs. This van came in with a brake pull to the right, (steering wheel moves almost 1/4 turn) especially if you just tap the brakes. If you apply the brakes normally it will pull right slightly then straighten out again. Pads were all worn ...
2002 Chevrolet Malibu 3.1L caliper and mount VIN: 1G11NE52J5
Applying brake pressure to caliper assembly on left front( driver side) something is causing a creaking in the hose and caliper area only on the one side. we replaced the flex hose on this side. noise is still there. thought it night be hose distortion, new ho...
2002 Chevrolet Silverado 2500 6.0L Cooling Systems VIN: 1GCHK29U72
Hello, This is a first time post here so i'll try and get it right. (R.O. customer's complaint) Check vehicle overheating while pulling camper will overheat after just driving 5 to 7 miles. Customer did not bring camper at first and I could not duplicate compl...
1994 GMC Safari SLE 4.3L Cuts out, Stall, MIL Lamp on VIN: 1GKDM19W7R
hello everybody,this truck is stalling intermitent at any speed,at the same time mil goes on.no codes found.if i leave the engine running at idle and i turn on the lights truck is stalling (most of the time).i tried several accessory and it also does the same ...
1997 Oldsmobile Aurora 4.0L No Start, Hard starting VIN: 1G3GR62C6V
Vehicle will randomly either not start or will act like way out of time or exsesive cranking to start. Then next time will start like a dream. Problem more predominate after long sit time but could happen imediatly after shuting vehicle off. Have checked all t...
1999 Oldsmobile Intrigue GX 3.8L Starter VIN: 1G3WH52K6X
Hi Ya'll, Well, this one was brought on the hook as a no start. Turn the key and all the dash lights light up like they should as you turn it toward "start", but the starter didn't engage. Check for power at the little start wire at the starter as we turned t...
1997 Pontiac Grand Prix SE 3.1L Panel Air Flow VIN: 1G2WJ52M8V
With A/C on,system blows normally (cold) out of right hand vents,but blows hot air outof the left side of the dash. This car does not have dual controls. Alldata is no help, and I don't feel like pulling a dash out and finding nothing.(I'm gettin' too old for ...
1999 Pontiac Grand Am SE 3.4L all gauges VIN: 1G2NE52E6X
on finial test drive had overheat at stop signs no fans, burped coolant and then fans great no problems just about to return to customer and gauges go dead like the key off and has a tcs light, key off and back on no change, talked to customer has had intermit...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L fuel enable VIN: 1G4CU521OS
Well it is fixed. The relpies I got were tied between the lock cylinder and the PCM. I really thought the lock cylinder was ok but being the cheapest part I tried one. One of you suggested that I could just plug it in under the dash {instead of tearing down th...
1992 Chevrolet Astro CL 4.3L 3-4 shift VIN: 1GNDM15Z7N
I'm kind of ashamed to admit the fix. It was tv cable adjustment. This thing is really touchy. If you adjust too far to start with, it will not shift into high gear at all untill you cut the van off and let it sit for a few minutes, the start adjusting a littl...
1998 Chevrolet K1500 Cheyenne 5.0L Misfire, MIL Lamp on VIN: 1GCEK19MSW
Hi guys sorry it took so long to respond we have been very busy and I wanted to give the customer a chance to drive the truck for awhile. I have learned a lot from this truck and will never forget this job. the fix was a valve job, I could not believe it when ... Trouble codes: P0300, P0420.
1999 Chevrolet Malibu LS 3.1L fuel gauge VIN: 1G1NE52M5X
I received 11 replys to me request. Ten of you said there could be a problem with the sender. The sender was bad. The contacts had been rubbed off and did not make good contact. We also had a problem with the IPC. With the car sitting still and the key on the ...
2002 Chevrolet Impala 3.4L Inst Clust,Radio,Starter,A/C comp VIN: 2G1WF55E52
Thanks to all who offered help on this car. The worst part with this car is it would only act up very rarely. I recieved 5 reply's on it, Mike [...] all responded. Tim was quite convincing, lol....
1990 Oldsmobile Toronado Trofeo 3.8L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy VIN: 1G3EV13C1L
Thank you all for your help and many good suggestions. After reading GM's Fuel Injection Diagnosis article here on IATN and several people saying the ECM is suspect, I decided to backprobe both B+ terms and the IGN+ term at the ECM while monitoring Battery v...
1999 Pontiac Grand Prix SE 3.8L fuse/relay center VIN: 1G2WR215FX
the relay center is not serviceable. the customer ordered one from GM, (so he wouldn't have to pay the meager 18% markup we get on dealer parts!), and scheduled an appointment to have me install it. the day he was supposed to get it towed in, he showed up driv...
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