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Prev Professional Automotive Repair Technical Discussions for January 4, 2012
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Cooling Systems VIN: 3G5DB03E82
hi, I have a buick that came in with upper and lower rad hoses colapsed.. the overflow bottle was full but the hose is not blocked. had a hard time removing the rad cap becase of vacuum.. customer is complaining of lack of heat. co test comes up nothing and pr...
1990 Chevrolet C1500 Cheyenne 4.3L engine, fuel injection VIN: 1GCDC14Z2L
hey guys hope everyone had a nice holiday. i'm writing to ask for some advice for a buddy of mine. he has a tbi system on his truck now and it doesnt run to good, we would either like to know if its possible to switch to a port or sfi type fuel inj system and ...
1994 Chevrolet C1500 5.7L Electronic VIN: 1GCEC14K6R
Sluggish on take off at light throttle. At 20-40 MPH, the lock-up for the transmission goes in and out. It feels like it is oscillating between gears but it is not. The reading from the vehicle speed sensor on the scanner is 40 MPH when the actual speed is 20 ...
1999 Chevrolet Lumina 3.1L Starting VIN: 2G1WL52M2X
Ok, I go to customers house because her car wont start. She told me it has not ran for 3 months. First the battery is completly dead (Had like .265v). So I just put in a new one. Then try to start and get nothing, no crank, no click, but the headlights are bli...
2002 Chevrolet Silverado 2500 6.0L Steering VIN: 1GCHK29U22
Thanks in advance for any replies...they will all be helpful!! The truck has developed a whine in the p/s system. It has hydro-boost...Customer states it is quiet in the morning while cold, which i did confirm. While watching the fluid in the resevoir, at full...
2006 Chevrolet Trailblazer LT 5.3L front axle VIN: 1GNET13M16
I have a front axle that is not engaging. It has a code C0379 acuator circuit malfunction. I have power, ground, and the switch signal switches on the scan tool from unlock to lock when power is applied w/jumper wire. I replaced the acuator and no change. The ...
2008 Chevrolet Uplander LS 3.9L heater core VIN: 1GNDV23188
Hi I have no heat at idle but plenty while driving temp gauge is steady so I dont think its a bad head gasket I did flush (just use garden hose and water) the heater core but no differance although I maybe needed to flush it more,(THIS USED TO WORK ON OLDER GM...
1989 Pontiac Firebird Trans Am 5.7L hard start VIN: 1G2FW2189K
car was towed in due to a no start. i was able to get car running with a shot of starting fluid. didnt run good but enough to get it in the bay and diagnose. i was able to unplug about 6 injectors with no change to idle quality. s oohm tested injectors and tho...
2005 Pontiac Grand Prix 3.8L temp VIN: 2G2WP52255
heater had 2 problems 1 blend door accuator not working installed new one heater core was done with new t-stat system bleed done then when driving on a decel coming to a stoptemp will go cool to warm never hot till under a load whendriving then the heat kicks ...
2006 Pontiac Grand Prix 3.8L Compressor VIN: 2G2WP55256
I'm desperate so I appreciate any help. I sold this car with the promise of fixing the ac and now I'm stumped. My customer is leaving for AZ Friday and I'm almost out of time. If I bypass the AC relay, everything works as it should. I have good pressures and ...
1998 Saturn SC2 1.9L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G8ZH1272W
Thanks in advance for any help. Vehicle originally came in for misfire and poor fuel economy and smoking bad. Checked for codes and found P0302. Checked spark plugs and found #2 fuel soaked. Checked injector pulse and found #2 was always on(noid light on stead... Trouble codes: P0302

Fixes & Summaries for GM
Fix/Summary Answers
2006 Chevrolet C4500 Kodiak C4C042 6.6L drivetrain VIN: 1GBE4C3286
We did not fix the truck, customer has four of these trucks. The one with the vibration is four wheel drive with a short wheel base. All other trucks two wheel drive with longer wheel base. Complaint came from driver of vehicle, he is a new employee. After che...
2006 Saturn Ion-3 2.4L Poor Idle Quality VIN: 1G8AW15B06
Well, it looks like this one is fixed. While taking into consideration the good replies I had here, along with scouring the internet for other cases similar to this, I learned that this is not an uncommon issue after cleaning the throttle body on these vehicle... Trouble codes: P0507.
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