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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 14, 2005
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
1974 Buick Riviera 7.5L reverse
This th400 slips and shudders in reverse. All other gears work perfectly. Line pressure is correct, even in reverse. It started after rebuilding the trans for a torque converter failure. The direct clutch and low/reverse servo air check good. But here's the in...
1992 Buick Roadmaster 5.7L Stall VIN: IG4BT537NR
This is a wierd one. This vehicle stalls only when taking a left turn. Starts right back up. Found a bad fuel pump harness and replaced that, the fuel pump, and sender. There are no codes and data stream looks normal. Has anyone run into this problem. Found no...
1997 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K2V
Re-curring evap code P0446, evap system cansiter vent blocked. Clear code, customer drives car for 2 days and the MIL comes back on in exactly the same spot at exactly the same mileage every time (this only happens to him, we have driven the vehicle several mi... Trouble codes: P0446 (evap system canister vent blocked)
1997 Buick LeSabre Limited 3.8L Speedometer VIN: 1G4HR52KXV
Customer brought vehicle to be checked for speedometer not working. Started to work shortly before he got to shop. Test drove with scantool and monitored. Would not act up. Has been this way for a month. Works about half of the time. Will come and go while dri...
1996 Cadillac Seville SLS 4.6L Illumination lights VIN: 1G6KS52Y6T
The affected lights are on 24/7. They are within the power window switches and a diffused light directly above the window switches as well as illumination within the headlamp switch. (9 total, two @ each door & 1 @ headlight switch) These lamps are powered th...
1998 Cadillac Catera 3.0L Traction
I have ABS,Traction,lights on and no speedometer.Getting a P1844 traction control I have got in and crank it up and everything work good until I restart.
1995 Chevrolet Blazer 4.3L brake warning light VIN: 1GNCS13W8S
hello itan members i have this 1995 chevy blazer that will turn the red brake warning light on as soon as you get above 15 mph. will stay on soild at all speeds above 15 mph, the light will go off below 15 mph and will not come back on till speed goes back up...
1995 Chevrolet Blazer 4.3L unknown VIN: 1GNDT13W4S
Popping noises, right front. When starting from a stop and wheel is turned either direction and under 5 mph. Does it in drive or reverse. Appears to happen when the front of the vehicle raises when turning and accelerating from a stop. Slow or normal accelerat...
1995 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, Surge, Stall VIN: 2G1WX12X4S
This vehicle came in with a rolling idle problem. Approx. 30 seconds after the car is started the idle starts surging. The idle will progressively get worst, going up to about 1500 rpm then dropping back down and stalling. I hooked up a idle air control tester...
1998 Chevrolet K3500 Cheyenne 6.5L engine VIN: 1GCHK33FOW
have 6.5 diesel that sucks air into the exhaust pipe and white smoke out the intake. is new motor never ran from auction. any ideas
1998 Oldsmobile Silhouette Premiere 3.4L Misfire VIN: 1GHDX03E3W
After installing a rebuilt engine in this van it misses on cyl #6 at idle when engine is warm. Step on the gas pedal and miss disappears or turn A.C. on and miss dissappears. According the misfire count on my red brick, #6 misfired 1,888 times in 30 min. Cyl #... Trouble codes: 0300 (Random misfire)
2000 Oldsmobile Bravada 4.3L fuel gauge, security, battery, abs, awd, etc VIN: 1GHDT13WXY
This truck was brought in to repair a non-working fuel gauge. On her way here, she called to let me know that a lot of the indicator lamps were lit on the dash. This would includeABS, security, air bag, service awd, low fuel, & battery. After spending several ...
2001 Pontiac Montana 3.4L Rear A/C Lines VIN: 1GMDX03E21
Hi GM PRO'S, I have a 2001 Montana with a leaking spot on the high A/C line about 3ft downstream from the rear evaporator... My question is: Is there an alternate method known or available to join the aluminum lines WITHOUT the use of the Kent-Moore or FMSI...
2002 Pontiac Grand Prix SE 3.1L Cuts out, Misfire VIN: 1G2WK52J22
Okay guys. A challenge. Have this car that only cuts out at 4200 RPM. Up to that speed runs GREAT! Acts like it is coming up against the rev limit but I know that rev limit does not kick in untill excess of 5700 RPM. I feel I must appologize because I don not ...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Chevrolet G20 Sportvan 4.3L MIL Lamp on, running lean VIN: 2GBEG25Z1N
While checking grounds at the back of the right cylinder head I found a taped harness against the exhaust manifold and there was an exposed wire grounded to the manifold...I made a repair and repositioned the harness away from the manifold and all is well...Th... Trouble codes: 13.
1993 Chevrolet C1500 Cheyenne 5.7L door locks VIN: GCDC14K4P2
Many thanks to those who replied to this, I found two wires crossed and put them back into the correct spaces. Its working fine now bye for now Gabriel.
1994 Chevrolet Corvette 5.7L Starting VIN: 1G1YY32PXR
We received 6 replies for help on this one. I understand it is hard to offer help with so little info to go on. We had suggestions of the VATS system(lock cylinder)you could move the steering coulmn and it would not fail. The customer never did mention being l...
1994 Chevrolet Lumina Euro 3.1L Poor Idle Quality, Surge, Cuts out, Misfire, Hard start when hot VIN: 2G1WN54T6R
Hello everyone and thanks for all your replies.After trying a few things I was told about in here with not much change I put my Ign. scope back on it. My KV spark was low So I changed out the Ign. module and its was the cause of the whole mess
1996 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1445T
First let me apologize for the delay in my response. I had to get the gentleman to bring the truck back. Second, I have a new rule of thumb. Do not work on a vehicle unless you have some idea of the repair history. I jumped on this vehicle thinking it was ju... Trouble codes: P0122 (TP Sensor).
1997 Chevrolet Malibu 2.4L Misfire, MIL Lamp on VIN: 1G1ND52T8V
The problem turned out to be leaking injector on #3 cyl...I took out the plug and put shop air in cyl with intake valve open and used a soapy spray just like looking for a leak in a tire...the air was comming out of the side of the injector where thee metal pa... Trouble codes: 300 (random misfire), 121 (tps out of range).
1997 Chevrolet C1500 4.3L Misfire VIN: 1GTDM19W3V
Well this one is fixed but spent way too much time on it. Put it on the back burner for awhile but went back at it yesterday, I ended up replacing number 1 injector. Road tested the truck misfires were gone completely. Boss road tested the truck again with no ... Trouble codes: P0301.
1997 Chevrolet Venture LS 3.4L Power Steering VIN: 1GNDX03E0V
The Fix for this Venture Van was to change the steering rack. Most replies favoured the steering rack but a couple mention power steering lines touching the body .Thanks Mike
2002 Chevrolet Trailblazer LS 4.2L No Start VIN: 1GMDT13S72
Thanks for the advice. Most of you had the right answer. The problem was the ignition switch. I'm surprised that the service manager at our local GM dealer had no answer even after the parts dept. said they stock and sell a lot of switches. Thanks again for th...
1999 GMC Savana 2500 5.7L No Start VIN: 1GTGG25R6X
I belive with confendence that this van is a fix. installing the proper fuel pump is the trick but witch one would it be. Ive investagated the knowlage base and found DAVID from NORTH CAROLINE replying to KEN SMITH from GAINESVILLE TEXAS, about using NAPA fuel...
1999 GMC Sierra 1500 SL 5.3L No Start VIN: 1GTEK19T7X
well after reading all the help replies 4 out of 6 sujested replacing the lock cylinder. but before i replaced the lock cylinder i disconected the 3 wire connector at the lock cylinder after getting it started, as sujested by another reply.that put it into sec... Trouble codes: P1631.
2000 GMC Sierra 1500 SL 4.3L ABS Light VIN: 1GTEK14W0Y
I believed that I had stated in my post that the ABS light would go out ) when the engine started ... and come back on in 2 seconds. (NO stored codes ... and ABS LIGHT ON) The OTC scan tool showed that there were NO stored codes. And I thought it odd that ...
1994 Oldsmobile Cutlass Supreme S 3.1L Poor Idle Quality, Surge, Stall VIN: 1G3WH55M7R
Hello Techs believe it or not i finally got this thing figured out and all it was was the Intake Air control, replaced that darn thing and all is running good
2002 Oldsmobile Bravada 4.2L Stall VIN: 1GHDT13SX2
Well I am going to call it fixed, I have not heard from customer for almost 3 weeks. I had the local dealer reprogram the suv after giving them the tsb # (03-06-04-057) after reprograming the transmission shift points were noticebly higher & I assume they al...
1993 Pontiac Grand Am SE 3.3L No Start VIN: 1G2NE54N1P
Hello friends. I wish to thank Dean, Jamie, [...], Mark, VIJ Vis. Mike, Rich, and George. The shop has been very buisy and I havent had time to even get close to this car. I appoligise to all members for not closing this post by now. espically the IATN staff... Trouble codes: 42 (ESC ckt grounded or faulty bypass line.).
1995 Pontiac Bonneville SE 3.8L engine VIN: 1G211252K5
Well Most every one had the same idea The PCV system. They were right someone had installed the PCV valve was installed incorecetly... thanks to all
1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52TXT
HelloGuys and Girls I have not recieved any word from the shop as of now and how they are making out with the car I poste ... I recived some information from some techs about the pass key and the relearn between the ICP n the PCM ... I handed the info to the s...
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