Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 9, 2008
International Automotive Technicians' Network (iATN) - Members Only
Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1989 Buick LeSabre Custom 3.8L Hesitation, Cuts out, Misfire VIN: 1G4HP54C3K
hello techs, this buick is strange. it sits in open loop for a long time, when in open loop it hesitates and feels like it is misfiring with light acceleration. if and when it goes into closed loop it runs great. but let the car idle a while and it will return...
View
1992 Buick Roadmaster Limited 5.7L compressor clutch VIN: 1G4BT5377N
Car came in for a/c not blowing cold and found that the clutch was not engaging. Replaced clutch relay and clutch worked fine so we returned the vehicle to the customer. Car came back a week later with same problem. Relay works fine and all wiring appears to b...
View
1994 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52116
Misses, dies,restarts, runs rough at times.Checked cam magnet,Don't understand EST line not toggling. Thanks in advance Trouble codes: 341 (Intermittent Cam Signal), 361 (EST line not toggling)
View
1997 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K5V
this vehical runs fine when driving normal but when you put it under a load such as tring to take off fast ,pass someone or going up a hill number one cylinder misfires.ive tried switching injectors,switching coils,new ignition module,new plugs and wires and p... Trouble codes: P0300
View
1997 Buick Riviera 3.8L Stall VIN: 1G4GD221XV
Hello all hope someone can help me before I drive car of cliff. Problem with car it that is stalls on decel but concern is very random. Always immediatly restarts. I had this in a few weeks ago for this concern could never find anything definate with it other ...
View
1999 Buick Regal LS 3.8L steering system VIN: 2G4WB52K7X
As always,thanks in advance for all assistance. This Regal came in to us with a "feels funny on turns" complaint.On test drives the steering wheel would pulsate when turning the wheel slightly in either direction from center.We did all the basic checks,such as...
View
2000 Cadillac DeVille 4.6L blend door VIN: 1G6KD57Y7Y
I removed the actuator once again. Checked all 3 levers and all but one are free to move. The lever for the vent door will not budge!!! The defrost and floor levers are moving freely. So, that explains the problem with no airflow to the vents. My question is....
View
2003 Cadillac DeVille DHS 4.6L 4th Gear VIN: 1G6KE57Y93
Greeting GM Transmission guys, this one has me stumped. Customer purchased this vehicle from an insurance company, "As is" [theft recovery] and it didn't have a key. GM dealer somewhere got them a key, did the usual key learn procedure and they were on their w...
View
1977 Chevrolet C10 Cheyenne 5.7L Gasoline VIN: CCL447F479
Hi old Chevy tech.Truck was in for replacing filler tubes and hoses (Because of its age. Later on customer bring back complain can not put gas in, keeps pushing out like it is full. Ck vent tubes ok. Don't know what else to check, please advise.
View
1986 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G1YY0783G
car orig visit found 2 bad inj cust took home and replaced all inj with new injectors per tsb. cust brought back hardly running.found only 3 injectors working checked inj signal looks good. currant ramped batt side no current rise injector resistance 16-17 ohm...
View
1991 Chevrolet Camaro RS 3.1L No Start, Stall VIN: 1G1FP23T8M
look for some gm help here. this car came in and prior tech believed fuel pump to be bad replaced fuel pump and on test drive it died again.the replaced module and pcm. i just got involved in vehicle now and when this happens car has to be hot still has spark ...
View
1995 Chevrolet G30 Chevy Van 5.7L Poor Idle Quality, Stall, no power VIN: 1GCGG35K2S
Vehicle came in for rough run, and stalling in gear, it searches for idle, but wont stay running. Check for stored codes, none found. No CEL on.replaced one injector/poor spray pattern.cts temp/resistence ok map checked ok.replaced ecm and prom,no chang.also h...
View
1997 Chevrolet Monte Carlo Z34 3.4L Oil drive O ring VIN: 1GERTYUI34
Has anybody had any success with the oil pump drive oring with out pulling the heads?? Thankyou.
View
1998 Chevrolet Express 3500 5.7L No Start VIN: 1GCHG35RXW
This truck is kicking my butt. Towed in for crank no start. Good fuel pressure but no spark. Scanned computer & had code P0336 stored in memory. Replaced crank sensor & all ok. This was about two weeks ago. Truck towed in again last Thursday for crank no star... Trouble codes: P0336 (Crank sensor circuit)
View
2002 Chevrolet Silverado 1500 5.3L unknown VIN: 2GCEC19T02
Customer states intermittently will push on brake pedal and nothing happens hot or cold. Pedal feels ok not hard or soft says he rolled through stop sign while pressing brake pedal, says nothing feels diffrent just truck will not stop. test drove vehicle stopp...
View
2005 Chevrolet Cobalt 2.2L elec assit power steering VIN: 1G1AK12F55
i have this cobalt that came in cust. complains that powersteering intermitant inop also complained of trans harsh shift,radio and speedo eratic operation and when it was acting up there was a clicking like relay from under driver side of dash.i installed modi...
View
1995 Geo Tracker LSi 1.6L Mechanical VIN: S3TA02C6S6
Help, we have now replaced 5 front crank seals and still have a leak. It definately is leaking from the seal, the housing and all areas close are dry. Have even run on the hoist with the timing cover off and verified that the seal is the only leak. Can the pum...
View
1998 GMC K1500 Suburban SLE 5.7L poor acceleration VIN: 3GKFK16R0W
suspecting fuel pump. ondemand says that fuel pressure should be above 60 psi constantly and napafix says it should be appx 60 psi with a 5-10 drop at idle what is correct? only has 51 psi at idle. also low amp probe test shows a pump spinning at 10,500 rpm bu... Trouble codes: P0420 (catalyst inefficiency)
View
2000 GMC Savana 3500 5.7L abs VIN: 1GJHG39R6Y
This one has a speedometer that is erratic, and ABS light on. C0238 wheel speed missmatch. When driven data shows rear wheel speed sensor is erratic, both front ones agree with each other, rear can jump up and down double the speed of the others. Alldata says ... Trouble codes: C0238
View
2004 GMC Sierra 2500 HD 6.0L abs VIN: 1GTHK29U54
Have a code C0055 for speed sensor circuit. Have follow flow chart excactly. Have another truck that I was swapping parts with. pCM, eBCM and speed sensor. have run jumper wires to elimnate wiring. have nothing left to replace. The code will come and go while ...
View
2001 International 4000 4700LPX 7.3L speedo VIN: 1HTSCABM51
speedo interminting
View
1999 Pontiac Grand Prix GTP 3.8L noise VIN: 1G2WR5211X
Hello guys i have a 99 grand prix and it is making a clicking sound when you start the engine. It is always there while the engine is running at idle but when you give it a little bit of throttle it goes away for a few sec. then comes back. I have replaced the...
View
2005 Pontiac Grand Am SE 3.4L Starting VIN: 1G2NE52E65
we installed an ignition switch in this car for a no start condition car has been good for 2 months . Customer states that car won't start again turn the key and dash lights shut off. Upon testeing we are not getting a signal to the starter relay, replace igni...
View
2003 Saturn Vue 3.0L MIL Lamp on, powerlosslight VIN: 5GZCZ63BX3
Any Saturn techs please help. This is a very intermittent problem. The check engine light comes on and sometimes the powerloss light comes on.Customer says transmission seems to shift funny when problem occurs. Have found TSB on the connector on the inside dri... Trouble codes: P0700, P0221, P1779 (No description), P2138 (TP sensor correlation), P2135 (APP sensor correlation), P2176 (Min throttle position not learned)
View

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Limited 3.8L fuel gauge VIN: 1G4HR52K3V
well we replaced the fuel level module located under glovebox and the customer hasn't been back in over a week (tg) seems like that fixed it thanks for all your help out there till next time.
12
1999 Chevrolet Malibu 3.1L Intermittent pull
Thanks for all the replies, sorry for the delay in closing. I replaced both upper strut mounts with factory parts. I'm not sure what the problem was as the new factory mounts seemed to turn with the same amount of resistance as the aftermarket replacement moun...
12
2001 Chevrolet Astro LS 4.3L Fuel Gauge, Temp Gauge, Instrument Cluster VIN: 1GNEL19WX1
This vehicle is fixed thanks to you guys and a long day! Like most of you guys mentioned, it was a ground problem. The ground #110 was not getting enough ground for all of the things that it was spliced with. I got a good ground straight from the battery, then...
12
2002 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY32G32
Ok, I havent got the car back so I could fix it, but I did get the info I was looking for. There has to be a problem with the larger vacuum line that goes behind the engine in the wire loom. There was no vacuum there & I didnt find a break in it. I may have to... Trouble codes: P0410, P1415.
5
2004 Chevrolet Malibu LS 3.5L trunk release VIN: 1G1ZT54854
Great News! This Malibu is doing fine at this time after some rather extensive research and testing and wiring repairs. Thanks to the 4 technicians who took time to help! There is a TSB from Gm on these cars for wiring chafing in the trunk. I inspected for thi...
4
2005 Chevrolet Colorado Z85 2.8L Torque Converter VIN: 1GCCS14895
Thanks for the help everyone. The problem was the harness inside of trans. Ordered new UPDATED harness and was just about to open the box and the customer called and said the truck was under warranty. I was told by my friend at the dealer that the new harne...
3
1995 GMC Jimmy SL 4.3L No inj. signal cold VIN: 1GKDT13W2S
I check VCM again found out it did not recognize VIN#, flashed VCM one more time, it recognize VIN# [...] Works fine now. Thanks everyone.
4
1995 Pontiac Grand Prix SE 3.1L fans VIN: 1GZWJ1ZM4S
GROUP, THANKS FOR ALL THE INPUT, I REPLACED THE BAD FAN MOTOR, & RAN CAR & BYPASSED COOLANT SESOR & FANS WOULD RUN, SO I REPLACED COOLANT SENSOR & ALL IS WELL , EXCEPT FOR THE PCM COMMUNICATING, THE PCM HAD ALOT OF CORROSION BUT CUSTOMER DECLINED REPLACEMENT A...
5
1998 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP12K8W
AFTER DRIVING THIS CAR SOME MORE IT ACTED UP ON US WITH A STALLING CONDITION WE SCPOED THE MASS AIR FLOW SENSOR AND DID NOT LIKE THE SIGNAL AT ALL.WE INSTALLED A NEW MASS AIR FLOW SENSOR RESET FUEL TRIMS AND ALL IS WELL IT HAS BEEN SEVERAL DAYS AND CUSTOMER HA... Trouble codes: P0171.
7
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next