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Prev Professional Automotive Repair Technical Discussions for April 15, 2014
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Help Request Answers
2006 Buick Rendezvous CXL 3.6L Cuts out, Stall, Forced Idle Mode VIN: 3G5DB03786
9-24-13 at 53,927 miles. Car was towed in while in forced idle mode. Tech found P0122, P2127, P2119, P2101 and P0626. He replaced TAC Assembly, APP Sensor and Alternator. 12-23-13 at 55,804 miles. Had P0102, P0122, P2101, P2119, P2122, P2127 and P2328. Tech r... Trouble codes: P2138 (App Sensor 1-2 Correlation), P2101 (TAC Position Performance), P0221 (TP Sensor 2 Performance), P0122 (TP Sensor Circuit Low Voltage), P0102 (MAF Sensor Circuit Low Voltage)
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2002 Chevrolet Silverado 2500 HD LS 6.0L power steering pump VIN: 1GCHK23U12
Having problems with Power steering pump - noise - excessive whine 1200 RPM Plus. Slow to no steering while brake applied at idle. Remember vehicle modifications - over sized (37") tires and (6")lift. Slight aeration of fluid , used non synthetic fluid to refi...
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2004 Chevrolet Venture LT 3.4L 3rd Gear VIN: 1GNDV13E24
Shop customer installed rebuilt trans and transfer case, and trans has no 3rd gear. We've isolated the problem to the valve body. Quite certain sticking valves from debris from their old tranny. Checking to see if anyone has replaced the valve body in one of t...
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2006 Chevrolet Uplander LS 3.5L tcc VIN: 1GNDV23L06
Hi all, got a transmission problem with this uplander. The tcc duty cycle ramps up and up to about 80 percent then drops to 0 most of the time almost in perfect sawtooth pattern, changes a little with different throttle settings. Scoped out with maxisys lookin...
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2011 Chevrolet Silverado 1500 LT 5.3L Trailer brake VIN: 1GCRKSE31B
Hi fellow Techs This truck was brought in with a "Service Trailer Brake System" warning on the dash. Looking under the vehicle I noticed a wire loom dragging on the ground (drivers side just under the rear seat). The customer travels on a mud/dirt road all the...
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2007 GMC Envoy SLE 4.2L Compression VIN: 1GKDT13S37
This vehicle has no ticking, no backfire through the exhaust or the intake, live misfire readings on cylinder five are all over the place the other cylinders have small history of misfires. Use the borescope both both valves opening and closing and cylinder wa...
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1998 Pontiac Grand Am GT 3.1L Stall VIN: 1G2NW12M7W
This vehicle starts and stalls apon start up and the theft light will blink for about 10 to 30 seconds and then stay on solid. If you try to restart after the light is solid the vehicle will start and stall again with the theft light blinking again for the sam... Trouble codes: P1629 (Theft deterrent fuel signal not received)
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet K1500 Cheyenne 5.7L Electrical VIN: 1GCEK14K8S
Like to thank all 17 replies on my help request. This vehicle drove me nuts for 4 days. Almost all of you guys mentioned something about engine not properly grounded to body. I founded all grounds were connected where they suppose to. Went into all fuse block,...
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2006 Chevrolet Express 3500 LS 6.0L No Start VIN: 1GBJG31U86
SORRY TOOK SO LONG BEFORE CLOSING. CUSTOMER LEFT BACK THEM AND SAID THEY WOULD RETURN BUT NEVER CAME BACK TO ALLOW US TO CONTINUE SO I DO NOT HAVE A FIX. THANKS TO EVERYONE WHO TOOK TIME OUT TO RESPOND Trouble codes: U1000 (Class 2 data link fault).
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2005 Pontiac Montana 3.4L ABS system VIN: 1GMDV23E85
We drove this vehicle many times while watching wheel speed signals on lab scope. Never dropped out while we had vehicle. Because we couldn't duplicate it, customer elected to go with new harnesses as suggested by many here. Issue has not re-occurred to this p...
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