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Professional Automotive Repair Technical Discussions for August 7, 2013 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1999 Chevrolet Silverado 2500 6.0L Poor Idle Quality VIN: 1GCFC29U6X Pickup came in for a hard start and rough running. Checked fuel pressure regulator first thing (and many times since) clean and dry. Found fuel pressure bleeding off and slow to build fuel pressure, replaced pump. Hard start problem solved. Sometimes when star... |
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| 2003 Chevrolet Suburban 1500 LS 5.3L App-Tps VIN: 3GNFK16Z43 App sensor 1 and 2 are close to being the same...at times up to 5% difference...whats the allowed range |
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| 2005 Chevrolet Malibu 2.2L Cuts out, Misfire VIN: 1G1ZS52F85 Vehicle idles smooth, has lack of power accelerating (no misfires) until 4000 rpm where it wont rev any higher and cuts out randomly misfiring on all cylinders. CEL starts flashing catalyst damaging until you let off throttle and light goes off and car returns... Trouble codes: P0300 (Multiple random missfire) |
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| 2006 Chevrolet Silverado 1500 HD LT 6.0L Transmission? VIN: 1GCGK13U86 Customer complained of no reverse at times, and wouldn't hold in park. Transmmission linkage externally looks good. On a test drive I noticed that when I put it in reverse I heard a kind of stripping,ratcheting noise and no reverse, I then tried Park and it di... |
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| 2007 Chevrolet Trailblazer SS 6.0L Stability VIN: 1GNET13H47 I can now make the problem happen by entering the freeway on a circular on ramp and accelerating. The stability light will flash and you can feel the right brakes being applied. Recorded data doesn't appear out of range with respect to steering angle sensor an... |
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| 2005 GMC Sierra 2500 HD SLE 8.1L timing chain VIN: 1GTHK23G95 Need help from GM guys, this 8100 is getting a complete rebuild and we were installing the timing chain and new gears but when there installed there's a tremendous amount of slack compared to other previous engines. this is a roller type chain kinda beefy, was... |
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| 2002 Pontiac Montana 3.4L No Start VIN: 1GMDX03E82 Hi, we're having trouble with an intermittent no-start on this van. I'd appreciate anyone who can offer some insight into this. The customer says that occasionally the motor will not start, and this can happen at any time. It can be with a cold motor or hot, t... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2005 Buick LaCrosse CXS 3.6L Engine VIN: 2G4WE53775 We have a fix. And the winner or shall I say the loser is...the thermostat. Will fill you in on the details. After questioning the customer a second time, more info was revealed. Apparently the customer purchased the thermostat from The Twilight "Zone", tha... |
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| 2002 Chevrolet Impala 3.4L bcm VIN: 2G1WF52E12 First I want to thank all of you for the prompt and numerous replies. The cust. is disabled and doesn't have a lot of money. So I tried ,as I'm sure many of you do, to keep the repair within his budget. I Had a friend of my son who is a tech at a local GM deal... |
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| 2006 Chevrolet Cobalt SS 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G1AP11P56 Cleaned throttle body and ck for vaccum leaks with no luck. customer needed car back and has not returned. Trouble codes: P0069, P0121 (TPS sensor 1 perf.), P1101 (Intake air flow system perf), P1182 (Superchager Inlet sensor perf), P0068 (Throttle Body Airflow perf). |
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| 2009 Chevrolet Silverado 1500 WT 4.3L fuel gauge VIN: 1GCEC19X09 When i pulled the pump and looked at the float sensor i could see that one of the wiping metal tangs that swipe the coil of wire was not even there. I looked for it in the tank but couldn't find it. Ordered another float level sensor instead of the whole pump ... |
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| 2008 GMC Acadia SLT 3.6L Refrigerant VIN: 1GKEV33728 Thanks, all, for the input. I was able to remove the blower motor oas several of you recommended. I looked at the evap with a borescope. Unfortunately there was no debris or any obvious leaks at the evap. I still suspect a small crack which I hope will con... |
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