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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 7, 2008
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Open Help Requests for GM
Help Request Answers
1989 Buick Regal Custom 3.1L Stall VIN: 2GC4WB14T3
Hello again everyone. This car was hardly driven. Only 30k miles. I have a problem with this car stalling when you put it in gear. I am leaning towards a problem with the ecm but would like some opinions/experiences before I change anything. The only thing I n...
1989 Buick Electra Park Avenue 3.8L No Start, Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1G4CW54C4K
The vehicle was driven for at least 2-3 months with an extended crank problem.When the customer came in I read the codes and found it had code 41 cam sensor circuit,I replaced the cam sensor which was no help.I tested the wiring from the cam sensor to the igni... Trouble codes: 41 (cam sensor), 42 (electronic spark timing)
2000 Buick LeSabre Custom 3.8L cat converter rattle VIN: 1G4HP54KXY
Car in for under car noise, traced to loose media in cat conv. Car runs perfect, no codes or other issues, has passed maryland state emissions test.I beleive Federal Emissions Warranty is 8years/ 80 K. Car is well under mileage, but just out by 3 months ( by b...
1982 Chevrolet Corvette 5.7L No Start VIN: 1G1AY8788C
car brought in on a hook. no start. no fuel pressure. initial testing showed no current to fuel pump. vehicle has spark and injector pulse. I can jumper 12V to pump and get about 3 lbs. I know I have pump problems, but I'm having trouble finding info on the po...
1987 Chevrolet Cavalier 2.0L Stall VIN: 1G1JC1117J
Car came to me on a tow truck, with no start problem. check it out and Starter was bad, replaced Starter now car starts and itmedeatly cuts off. check tbi and fuel comes out of injector when it statrs then fuel seems to stop and engine cuts off after engine st...
1997 Chevrolet Venture LS 3.4L rear shocks VIN: 1GNDX03E5V
This van has factory air leveling system on the rear. The van will sit level with no extra weight in it. When the customer hooks up his camper the van will drop down, the compressor raises the van to sit level and just after the compressor shuts off you hear a...
1999 Chevrolet Tahoe LS 5.7L Hesitation, Stall VIN: 1GNEK13R7X
Just looking for a little advice and direction here. Cust. stated that his Tahoe would cut out and act up when reaching 30 to 35 mph. I drove it to confirm this and it seems to continually get worst the more you drive. It feels just like an ignition cutting of... Trouble codes: P0339
2000 Chevrolet Astro 4.3L No Start, Stall VIN: 1GNEL19W6Y
Hi everybody, and thanks in advance for your time to read my request. About 6 months ago I replace the battery, then a few weeks later came back with no start, the tow truck driver couldn't get it to start either, so once he got it off of the tow truck, it sta... Trouble codes: U1255 (Genetic/class 2 Communication)
2002 Chevrolet S10 2.2L Hesitation, Stall, MIL Lamp on VIN: 1GCCS14512
Ihave this 02 s10 that very intermittantly usually when sitting at red light will start bogging and eventually stall.. the veh will always start right back up but the rpm will rise to 3500-3800 at idle and then slowly return to the normal 900. I have not been ... Trouble codes: P0108 (map sensor hi input), P0122 (tps low input)
2004 Chevrolet Trailblazer EXT LT 4.2L reduced power VIN: 1GNET16S24
have replaced app sensor. have tested sensor and they check out ok.have not been able to duplicate problem. customer says reduced power light will come on she then stops and shuts of vehicle restarts and all is ok.have checked connectors at tac,app,pcm...even ... Trouble codes: P2138
1992 GMC Sonoma 4.3L feul injection VIN: 1GTCS14Z3N
this customer recently bought this truck. he brought it to our shop because it would fail to start but only when it sets for 20 or 30 minutes. if it sets overnite or for several hours it starts just fine. when the truck does start it runs like a top. but the o...
2000 GMC Jimmy Envoy 4.3L radio VIN: 1GKDT13Y21
i cant get the truck to die . truck died three times on owner . tried wiggle test on the battery & cables . truck dies and losses power to the radio , the clock reset to 12:00 after truck died . truck did start right back up . owner said that it died one time ...
2004 Other GM COMMODORE 3.8L air con VIN: 6GIYX54R74
Hello to any Aussie members out there, this car int. blows hot air and registers a fault by displaying an X in the display panel.The car has been to the dealer 4 times and they havent fixed the problem. I havent a GMH scan tool,I think this is where I need to ...
1989 Pontiac Grand Prix 2.8L Misfire VIN: 1G2W514WXK
This vehicle has a new engine, with new plugs and wires. Don't know how it ran before, because engine was bad. It feels just like a secondary ignition misfire, only when TCC is engaged. Runs great any other time. I need to know if they had TCC problems, and if...
2000 Pontiac Grand Am SE 3.4L Right front VIN: 1G2NF52E6Y
This vehicle is driving me crazy.We have seen this car multiple times and every time they say the noise is gone for a couple of days and then comes back.We originally replaced the struts and strut mounts,also the brake pads and rotors.Replaced the mount on the...

Fixes & Summaries for GM
Fix/Summary Answers
1963 Buick skylark CID ride control
Thanks to all for your help. A lot of good info on checking the alignment specs and setting them up for radial type tires instead of bias tires. Front end parts all check good and rear drive shaft was just overhauled and balanced. I did get some information...
1999 Chevrolet Cavalier 2.4L ABS system VIN: 8Z1JE12T0W
As several techs pointed out the cause of this DTC was the lack of center stop lamp. A new center lamp was installed no DTC's set under the same conditions. Thanks everybody for your help and commentaries. You guys are great!!!.
2001 Chevrolet Tahoe 5.3L Misfire VIN: 1GNEK13T61
Well... The customer took the vehicle with a diagnosis of a bad a/c compressor to be the problem. 2 days later, the compressor completely froze up. Replaced the compressor, orfice, and dryer. Flushed the complete a/c system as there were alot of contaminen...
2004 Chevrolet Silverado 2500 HD 6.6L No Start, Hesitation, Misfire, MIL Lamp on VIN: 1GCHK242X4
Fuel pressure sensor was intermittently shorting V ref. I reproduced the problem by lauching the truck over some ROUGH railroad tracks at 50 mph. Why, who knows. Thank to all that replied, I looked into each of the recomendations. Trouble codes: P0193 (FR Press Sensor Ckt High Voltage), P0405 (EGR Vac Sensor Ckt Low Voltage), P0642 (5 Volt Ref 1 Ckt Low Voltage).
1999 Pontiac Bonneville SE 3.8L freon loss VIN: 1G2HX52K2X
Thanks for all the input!I mixed up some very soapy water and sprayed it all over.Last but not least the front of the compressor.Ding-ding-ding.Major bubbles from the comp.between the sleeves.Amazing that 2 sniffers and a dye light were no help.Always go back ...
2001 Pontiac Firebird Formula 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G2FV22G61
Fix was the injectors. The injectors that the customer got off the internet were the fat round half metal and half black style and the injectors that belong in this 5.7 G motor are the skinny plastic ones. Now fuel trims are near zero and the miss is gone. Tha... Trouble codes: P0171, P0174, P0306.
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