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Prev Professional Automotive Repair Technical Discussions for May 18, 2012
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Open Help Requests for GM
Help Request Answers
1990 Chevrolet Camaro Iroc-Z 5.7L No Start, no injector pulse
This one Iam looking for some advice focusing on the ECM only. After all my testing, Ive concluded that the injector driver circuit is faulty. The engine and management system is in a 56 f100 truck. It has an aftermarket PROM from a speed and marine shop. The ...
1994 Chevrolet Corvette 5.7L Poor Braking VIN: 1G1YY32P7R
This Corvette has a poor braking problem at speeds above 40 mph. If you stop slowly it is fine until you try a panic stop. The pedal goes down about half way then stops, hard as a rock and the car will not lock up the brakes even with the abs disabled. The tem...
1998 Chevrolet Corvette 5.7L Cuts out, Stall, Steering lock VIN: 1G1YY22G9W
Car taken out of storage & came in for basic oil change & neither key fob working. Found batteries dead in key fobs. Changed, tried to sync two together(old method - didnt work) - Synced correct way through cluster & worked. At sometime during or after this pr...
2001 Chevrolet Corvette Z06 5.7L Poor Idle Quality, Misfire VIN: 1G1YY12S81
I hope someone can help me with this one. This Z06 came in with a light misfire at idle, datastream showing active misfires mainly on cylinder #4 and occasionally on #3. Found only 50 lbs. compression on #4. Pulled the right side head and could see where the g... Trouble codes: P0300 (random misfire)
2007 Chevrolet Colorado LT 3.7L security system VIN: 1GCDS19E17
hello techs out there. i have bought a 07 colorado with 5cil engine. it is a collision car with front end damage.i got the car without the key,so when i was finished rebuilding the car,i ordered a new key. brought it to a locksmith to get cut and all went well...
2008 Chevrolet Suburban 1500 LTZ 5.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 3GNFK16318
We moved the coil, plug, and injector to other holes. That didn't move problem. gave back and customer came back same codes came back. Compression is 135psi on cylinder 8. Acts up at random. Acted up sitting still at fast food line and when he started driving ... Trouble codes: P0300, P0308, C0561
2000 Oldsmobile Alero GLS 3.4L No Start VIN: 1G3NF12E8Y
Vehicle has an intermitten no start. When problem occurs, "service engine soon" indicator does not illuminate. When "SES" indicator does illuminate, vehicle will start. Vehicle may start 5 - 10 times with no problem, then problem will occur. Vehicle will have ... Trouble codes: U1000 (serial data lines)
2000 Saturn LS2 3.0L Hesitation VIN: 1G8JW52R9Y
Ok, we think we have this narrowed down but I would like another opinion. This thing will not excel. over 1000 rpm without it falling on its face. It will idle just fine all day. We've done a cat and fuel filter first. We also replaced the mass airflow. There ...
2007 Saturn Vue 3.5L Compressor VIN: 5GZCZ534X7
We have this Saturn that blows warm air at idle. It does improve with higher rpm and vehicle motion. We replaced the expansion valve and have same pressures. Does this vehicle have a variable rate compressor? And would a weak compressor cause these pressures...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick LeSabre Limited 3.8L Drivability VIN: 1G4HR54K63
I replaced the steering angle sensor and havn't heard back from the customer. Hopefully it is fixed. Thanks for the input. Randy.
2000 Chevrolet Impala 3.8L no start VIN: 2G1WF55K5Y
I couldnt get the new passlock to relearn. SO I tried the old one again. I put the old passlock and tumbler back in and relearned it by leaving on for over ten minutes. I had to do it twice. Then car started with no security light. So instead of trying to r...
2003 Chevrolet Venture LS 3.4L Hvac gauge VIN: 1GNDX03E03
The customer wanted a new one, installed it and good to go! Thanks for all of your help guys!
2003 Chevrolet Tahoe LS 5.3L oil VIN: 1GNEK13T23
GM has a updated oil pickup screen o ring. I replace the O ring and Tahoe is running fine now. I call the custom, after five days and still running fine. Maybe I got lucky. Thank for all the advice.
2004 Chevrolet Colorado LS 3.5L abs code VIN: 1GCDS136X4
Well. After talking with the customer, there is currently no further complaint on the ABS activation. The customers has put 675 miles on the vehicle since first tested and inspected We had informed them that more than likely the problem is not solved. We are ...
2001 Saturn L200 2.2L airbag light VIN: 1G8JU52F91
Thank you to all who helped out on this one, it is fixed. First of all, we did not have the red cable for using pass thru with the Tech 2, and I doubt at this point in time it's really worth buying anymore. I just sent the car down to a local GM dealer and h...
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