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Prev Professional Automotive Repair Technical Discussions for March 20, 2014
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Open Help Requests for GM
Help Request Answers
1999 Buick Century Custom 3.1L Starter VIN: 2G4WS52M0X
I have a great one, This car came in with a no start condition. There was no power at the purple wire at the starter. I traced it down to the wiring harness at the battery was all eaten, and repaired the wires, and someone before me has put in a used ecm. now ...
2000 Chevrolet Express 3500 6.5L No Start, Poor Idle Quality VIN: 1GBJG31F9Y
Let me start by saying I am not a diesel man, this belongs to one of my regular customers and I am trying to help them out. Vehicle was towed in with crank no start condition. Found fuel present at the Schrader valve close to pump. Pressure was at 8 psi. Opene...
2003 Chevrolet Impala 3.4L rear defogger VIN: 2G1WF52E93
Customer complaint is rear defogger inop. Also, when rear defogger is turned on radio has bad reception. This car has the antenna integrated into the back glass along with the rear defogger. I tested the grid with a test light, it does power it up on some of t...
2005 Chevrolet Silverado 1500 LS 5.3L hub VIN: 2GCEK13T05
Hello Everyone, This truck came to me after many repairs and an on going problem. First the lf hub was replaced because of defective bearing. Within only a few miles bearing was bad again. Hub was replaced again. soon was bad. Throughout the process the owner...
2005 Chevrolet Trailblazer LS 4.2L A/C Compresspor VIN: 1GNDS13S05
A/C blows cold when it's working which will last 15-30 minutes then the compressor disengages. Jumped the low pressure switch and the compressor engages. Checked continuity from pcm to high side switch, fuse, and relay. Everything checks out. Reassemble the a/...
2006 Chevrolet Silverado 1500 Hybrid 5.3L Hydraboost VIN: 1GCEC19T76
This vehicle makes a very high pitched noise at the hydra booster when the steering wheel is turned full stop in either direction and slightly released. The noise quits any time the brake pedal is pressed. I have read about lots of complaints about noise when ...
2006 Chevrolet Silverado 2500 HD WT 6.0L long start VIN: 1GCHC29U56
Thanks in advance for anyone who takes the time to read and/or offer any assisstance on this problem. Truck came in from another shop with a long start on hot soak. It has never acted up on a cold start with me or the customer. We have experienced a normal cra... Trouble codes: P0622, P1637
2007 Chevrolet Silverado 2500 HD Classic LS 6.6L Hesitation, Cel VIN: 1GCHK23D57
Hello All, Recently replaced a Turbo on a 6.6L for P2563, P003A (turbo vane position). After replacement we have an intermittent P0299 (underboost) code. It appears to be on initial drive, engine not to full temp, will act like a bit of a dog on first pedal ... Trouble codes: P0299 (Turbo Underboost)
2009 Chevrolet Silverado 1500 LT 5.3L False message on IPC VIN: 3GCEC23J39
While driving normally will suddenly get a message on the IPC "Engine HOT/AC turned OFF", but engine performance is NOT effected. Fans ramp up to MAX speed. AFM is disabled(won't run on 4 cylinder at highway speed). Coolant temp gauge drops to COLD(160F) from ...
2010 Chevrolet Equinox LS 2.4L Hesitation, Stall, only when ice cold VIN: 2CNFLCEW0A
Our customer brought this car stating only when cold, the Chevy Equinox has a miss when cold, and has very little power. Also, sometimes when cold it will stall while idling. There is a tSB for a pcm reflash (I cant remember the number right now, sorry). So I ... Trouble codes: P0690, P2119 (throttle closed position performance)
2006 GMC Sierra 2500 HD SLT 6.0L fuel gauge VIN: 1GTHK23U76
fuel gauge inop. empty + low fuel light on.code po 463 fuel level sensor open.does work with scanner doing a sweep. disconnected connecter at sender and jumper sig. to ref. wires cleared code. still reading empty. signal wire reads 5 volts.ref.wire strong grou...
2006 Hummer H3 3.5L cylinder head VIN: 5GTDN13666
I need to ask...should I sell a timing chain if doing a cylinder head on this unit? The head needs valve seats/valve job, and there is a procedure for removal without removing the front cover. My customer is hemming and hawing about whether or not to spend thi...
2000 Pontiac Sunfire SE 2.2L temperature VIN: 1G2JB1243Y
Hot bottle wont hold pressure,car will run great all day then when freeway driven temp slowly rises to 212 then keeps rising after 10 miles...brand new radiator,waterpump,t-stat... ...I havnt let the new used engine go above 225 & Its been test driven 300 mil...
2009 Saturn Vue XE 2.4L heater core VIN: 3GSCL33P79
I am trying to replace the heater core on this Vue and I cannot get th instrument panel out.I have done all the dissassembly per Alldata, removed all the nuts and bolts that are supposed to be removed. The panel feels loose but will not pull away from the fire...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Cadillac DeVille 4.6L Tcc VIN: 1G6KD54Y52
replaced the tcc solenoid and it's fixed. thanks to all that took time to respond. as i mentioned in my post i had checked the solenoid, but i went back and energized the circuit with an amp meter and left it for a long time. after a few min the amperage sta...
2006 Chevrolet Malibu SS 3.9L MIL Lamp on VIN: 1G1ZW63156
ok everybody there was one of those alcohol things that you have to blow into installed and removed on this vehicle. So I traced the purple wire from the ecm to a cut wire behind the headlight. Tadd from Indiana made it very easy. I checked the voltage by the ... Trouble codes: P0463.
2009 Chevrolet Silverado 1500 LS 4.8L calipiers VIN: 3GCEC13CX9
First I would like to thank all for posting. I was unable to get the truck to fail again and driver needed his vehicle back. I did explain to him what I wanted him to do if the problem reoccured to help in future diagnoses. I inspected vacuum booster and maste...
2007 Saturn Ion-3 2.2L MIL Lamp on VIN: 1G8AL55F87
After checking wires and connectors, Replacing the ECM took care of this one, thanks to evryone that reply..
2008 Saturn Vue XE 2.4L MIL Lamp on VIN: 3GSCL33P08
Thanks to all for your help. I checked voltage at r/w wire at UBEC and it was very low so it most likely needs a UBEC. customer declined repairs. Thanks again Roland Trouble codes: P0449 (Evap vent solenoid control circuit fault).
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