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Prev Professional Automotive Repair Technical Discussions for March 26, 2012
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Open Help Requests for GM
Help Request Answers
1989 Cadillac Seville 4.5L ignition lock cylinder VIN: 1G6KS515XK
hello everyone , we have this cad seville that we have had in our shop for a long time now. we have done alot of work to the car and we had this car not start or crank one day. i did the resistance test on the key cylinder and found the resistance out of range...
1994 Chevrolet K3500 Cheyenne 6.5L Fuel System VIN: 1GCHK33F1R
This is my first experience with the older GM diesel's so please forgive me for less experience here. This is an intermttent problem, but the good news is its at least acting up often to run some tests. The basic problem is a crank no start issue, however it d...
1994 Chevrolet Astro CL 4.3L fuel VIN: 1GNDM19Z7R
Hello all, i had this van come in as a no start, the horn , headlights,fuel pump didnt work, this issue is fixed it was the fusible link behind the battery, but i noticed that it seemed to crank for a little longer than it should, but thought it was perhaps no...
1995 Chevrolet G30 Chevy Van 4.3L in limp mode VIN: 1GCFG35Z2S
Customer stated the vehicle will not shift and stays in limp mode. The vehicle has codes,59 fluid temp high,67 torque convertor quad driver 2 solenoid,82 shift solenoid A, 81 shift solenoid B. I tested the power going into the transmission on the orange wire a...
1996 Chevrolet K2500 Cheyenne 5.7L Stall VIN: 1GCGK29R8T
Have this 96 K-25 with 5.7R, auto trans. Intermittently the engine just dies, like you shut the key off. It always can be restarted immediately. It seems to act up pretty consistantly if it has sat for a few hours. Just idling it will die from one to five time...
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W5X
Blazer came in with no start when cold. After getting it started with a small spray of starter fluid I test drove and had low power. No codes, fuel pressure normal, Compression normal, spark and injector normal. found timing almost a post off so replaced timin...
1999 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEK14W8X
Thanks to all whom replies. I have this truck that will not start for the most part. It will hit partially maybe a few times. At first we checked the fuel pressure and it was fine 64psi. then we checked the the spark no surprise autolite copper plugs ...
2004 Chevrolet Colorado 3.5L Air Bag Light
Keeps setting B0083. Did I miss something, is there a cause not covered in Mitchell or All Data?
2006 Chevrolet Equinox LT 3.4L Air bags VIN: 2CNDL73F06
The first time it was in it had B0051 Deployment commanded, and B0102 incorrect EFS 1 installed. I told him he needs to replace the SDM, and see what that does for it. So he replaced the SDM with a used one, and the EFS with a GM one. I scanned it again, and i...
2006 Chevrolet Impala LS 3.9L RF turn signal VIN: 2G1WS55196
This thing has me running in circles. Everything tests as the wiring should be fine. I double checked to be sure the correct bulb was in the socket and works, the BCM shows the RF lamp out as active when it tries to actuate the bulb. It is getting the signal f...
2005 Hummer H2 6.0L Lock cylinder VIN: 5GRGN23U95
This H2 will at times now allow the key to turn. The owner stated that it took 30 Min's yesterday to get the key to finally turn. I have not been able to duplicate her complaint as of yet, but I do believe her. For me the key goes in like normal, turns like no...
2001 Saturn SL 1.9L Poor Idle Quality, Stall, Poor Fuel Economy VIN: 1G8ZF52871
Customer complaint of getting bad gas mileage and car sounds louder than usual. Scanned computer and saw the O2 code so I checked data and O2 seems to want to stay on the rich side. Only seldom did it get below .4. I also noticed the car would not go into clos... Trouble codes: P0133 (O2 lazy), P1133 (no O2 switching), P1599 (eng stall), P1626 (pcm to bcm loss comm), U1064 (lost bcm comm), U1301 (class 2 data link high)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Seville SLS 4.6L Cooling Systems VIN: 1G6KS52Y3T
The diagnosis is final. The reason for the engine remaining cool on the highway was there was little demand under cruise conditions. In stop and go traffic, there is more torque demand as the RPMs go up and down causing the head gaskets to leak. This engine ha...
2004 Cadillac XLR 4.6L MIL Lamp on
I was uneasy with changing the fuel pump, although I was tempted to do it. If it wasn't such a bear to get out, I might have just changed it, still, I just couldn't understand why I had good volume, low pressure, and no stumble or stall issues, even when openi... Trouble codes: P0171, P, 174 (System runs lean bank 2).
1996 Chevrolet S10 LS 2.2L Surge, MIL Lamp on VIN: 1GCCS1946T
After going over all of my readings, fuel trim, inspecting timing and verifying proper ignition. Tested oxygen sensor and reading was fine, not lean or reach biased. Decided to give the oxygen sensor a try. (when the head was removed there was no coolant go... Trouble codes: P0171.
2002 Chevrolet Impala LS 3.8L Turn signals and brake lights VIN: 2G1WH55K72
I wrote for help based on the customer calling after she left claiming the problem returned. She called after missing her return appointment to tell us it was working fine. So, I have no idea if the problem actually returned or if she was mistaken. Suggestio...
2004 Chevrolet Avalanche 1500 5.3L 2-3 shift VIN: 3GNEC12T54
Thanks goes out to all IATN Techs for taking your time tohelp and answer questions. Most advise was leaning to internal clutch problems being the culprit. I am still baffled by the 2-3 shift signal from ECM reading groung all the time(Not only at shift command...
1994 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX52L7R
Thanks to all, a few of you mentioned that the new ECU may have gone bad. This was a problem because another shop had put this in for a different problem, we checked all the sensors and wiring and then just got another unit and plugged it in and worked. The cu...
2002 Saturn L200 2.2L exhaust VIN: 1G8JU54F22
All in all it was the catalytic converter, The first time i didnt hear anything even when i took it off, the second time, i heard the brick inside and there it was. expensive thing but a new one took care of the noise, Thanks for the replies
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