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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 24, 2013
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
2008 Buick Enclave CXL 3.6L Power Steering VIN: 5GAEV23718
I inherited this job from another shop. I am told the original problem was no power assist. This vehicle is equipped with variable assist power steering. The previous shop replace the pump and installed a used upper column. When it came to me there was no powe...
1995 Chevrolet Lumina LS 3.1L engine, idle VIN: 2G1WN52M1S
Hi. Big problem. Vehicule runs for 2-3 minutes, starts a rough idle, and then stalls. fuel pressure 40 psi, raise to 45 when rough idle, seems like no injector pulse. Unable to retreive dtcs. OBD connector with 2 pins. Jumped 2 pins and no flash from engine li...
2004 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC19X44
vechile has 60psi fuel pressure,new wires,cap,rotor,plugs.will not start unless you spray ether in tbody,after vechile will start all day.if you put plug gap to .40gap vechile will start but runs badly.set plugs back to .60gap now no start.im suspecting clogge...
2006 Chevrolet Silverado 3500 LT 6.6L MIL Lamp on VIN: 1GCJK33D36
Hi guys I am having some trouble with this truck. What happened after doing headgaskets and the customer took for two weeks he called and said the check engine light came on and the engine was shaking badly. When the truck was towed in the truck ran fine and h... Trouble codes: P0205 (Cylinder 5 injector circuit malfunction)
2007 Chevrolet Tahoe LTZ 5.3L Misfire, MIL Lamp on VIN: 1GNFK13007
Hi all, This one has me scratching my head a bit. Car came in with the dash lit up and a p0300 stored. Data showed number 2 cyl counting up at idle only. Swapped plugs and coil and miss stayed with 2. Fuel pressure is good Injectors ohm out ok and flow iden... Trouble codes: P0300 (Random cylinder misfire)
2009 Chevrolet Malibu LT 2.4L Seals VIN: 1G1ZH57B79
Water leaking from drain tubes on sun roof ,problem located but drain tube must have shrunk,i cant pull it up into the gromment of the rain gutter
2009 Chevrolet HHR LT 2.2L MIL Lamp on VIN: 3GNCA23B59
this started out as a engine and trans job because dealer said it needed them and wanted us to change them which we did he supplied motor and trans not knowing what the problem was originally but he came back a week later with a SES on and p0171 and he said th... Trouble codes: P0171 (Lean b1)
2003 GMC Envoy XL SLT 4.2L Starting VIN: 1GKET16S93
Hello again. Very intermittent no crank problem on this GMC Envoy. Code U1000 and Body code B2960 "key code incorrect but valid". Closely inspected Pass key voltage and replaced igntion switch approx 5 months back with genuine GM replacement in hope of corre...
2007 GMC Savana 3500 6.0L No Start, Stall VIN: 1GTHG35U67
Hi Folks, I don't ask for help much but this one has me going nuts. truck came in with a stalls but restarts complaint. Go out to check the truck and its a no start. PERFECT!! Plug my scanner in "no comm". Has MIL light. all of a sudden some lights on the dash...
2008 GMC Sierra 2500 HD WT 6.0L ABS light VIN: 1GTHC24K28
Hello, I have here a truck with DTC p0055 rear wheel speed sensor malfunction. There are no sensors on the rear wheels. Does the ABS control unit use the transmission sensor? The speedometer works fine. I have no Mitchell or Alldata in this shop. I don't know ...
2011 GMC Sierra 3500 HD SLE 6.0L Data Bus VIN: 1GT423CG6B
This 2011 Sierra came in as a no-start, it will not crank. I have no communication with any of the modules on the low speed bus (dark green wire). All of the high speed modules communicate, including the BCM, which as I understand is on both networks. There ...
2008 Hummer H3 3.7L crank no start VIN: 5GTDN13968
hello everyone vehicle towed in crank-no start.secutity light was flashing so we performed relearn.vehicle started. we retried starting the next day-crank no start.checked signals at ign switch and bcm-all within spec's.performed relearn again and it starts ag...

Fixes & Summaries for GM
Fix/Summary Answers
1978 Chevrolet K10 Cheyenne 5.7L Cuts out, Stall VIN: CCZ1481165
I fixed it. Went out with my meter and checked wiring to the alternator as was stated. I found the sense wire shorted to ground who knows were. installed a new sense voltage added a small light bulb (4.6)watt to simulate the "charge" light and fired the truck....
1998 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNFK16R1W
We proved that it has a vacuum leak in the inside of intake manifold. Customer declined repair because he couldn't afford repairs. Thank you all for your help. IATN is still the best. Trouble codes: P0102, P0300, P0404, P0405, P0463, P1404.
2003 Chevrolet Silverado 3500 6.6L fuel in crankcase VIN: 1GCJK39133
Thank you all for your help on this truck. I replaced all the injectors as well as the 2 return lines. Truck has been gone for a week now with no fuel in the crankcase! Trouble codes: P0522, P1093, P1094.
2006 Chevrolet Equinox LT 3.4L No Start VIN: 2CNDL73F96
Thank you everyone for the help on this car. Even thou I had 12v at the fuse I found some corrosion under it. So I pulled it apart and found that the circuit board was shot. Put a new one in and fixed the problem.
2006 Chevrolet HHR LT 2.2L Steering VIN: 3GNDA23D96
well car is going to Chevy so it is out of my hair. Come to find out it is a used car from a dealer and there has been some things done that may cause a lot more problems so off to the dealer it goes . Thanks for the replies.
2006 Chevrolet Trailblazer LT 4.2L rear ac blower VIN: 1GNES16S76
Well it is fixed. My new snap on solus ultra scanner I just bought 2 months ago does not have software to access the rear ac. Since I could not find it I assumed it was not there after looking in every single module listed for codes and data. After reviewing r...
2006 Chevrolet Colorado LT 2.8L Timing Chain Tensioner VIN: 1GCCS14816
I had mixed responses. Some said just do tensioner, some said do the whole timing kit. I decided to replace the chain, guides, tensioner and tensioner shoe. The deciding factor is how far out the tensioner has to go to tighten the chain. Obviously the more...
2006 Chevrolet Silverado 3500 LT 6.6L Unknown VIN: 1GCJK33D36
Thanks Guys for all the help. All I had to do is jump the low side pressure switch to get the compressor to run and once it was full it would run as normal. Thanks again.
2004 GMC Yukon SLE 4.8L Poor Idle Quality, Surge, Misfire VIN: 1GKEK13V74
I did everything imaginable and possible and finally decided to take to the Dealer. They did a computer update, 6 updates available for this vehicle. Runs a whole lot better but still has a slight miss occasionally due to a aftermarket or worn cam according ... Trouble codes: P0300 (Multiple misfire code).
1942 Pontiac Streamliner 4.1L Fuel Pump VIN: THERE1SN21
Well it's out and back in it just took some patience and muscle but it poped out and the new one went right it car is finally running maybe we will get to drive her some this summer, just need to find a pinion seal for her. Thank you everyone for the helpful a...
2001 Saturn SC1 1.9L Monitors VIN: 1G8ZP12811
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