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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 1, 2014
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Eldorado Touring 4.6L blower motor VIN: 1G6ET129XR
I'm helping a friend at his shop. I'm an ex. GM guy with some Cadillac experience. Blower inop, Followed blower inop chart and went thought the on board diagnostic system. All on board seems normal with no ACP codes, hvac data looked normal and I did the overr...
2005 Cadillac CTS 3.6L radio,lights VIN: 1G6DP56755
when key is turn off radio stays on head lights and dash lights stay on. rap relay is not in right rear fuse block no wires. with tech 2 it shows relay on all the time. disconected battery and solves problem temporary. no codes. doors show open and closed with...
1994 Chevrolet C1500 Cheyenne 4.3L ignition VIN: 2GCEC19ZXR
So this old shop truck shutting down voltage to fuel pump no spark first I look in to neutral safety switch.I wig all the wire under steering shaft truck starts.up fine this morning iwigle the wire no start now I remember on this old truck they would fry the w...
2001 Chevrolet Venture LS 3.4L MIL Lamp on VIN: 1GNDX13EX1
Vehicke came in with trouble code p0327. Knock sensor replaced at anotjer shop. removed sensor looked damaged durring install replaced eith napa sensor no change. Tested wire from knock sensor to computer no opens short to ground or pwr. found wiring to 24 x c... Trouble codes: P0327
2002 Chevrolet Express 2500 5.7L smog monitors VIN: 1GCGG29R92
hello we have this van customers states he needs van to run monitors to get ready for smog he stated he drove it 4 hrs and no more of them have ran this a half cng van and half gas I clear all monitors and tried again I get the same ones to run again and then ...
2003 Chevrolet Silverado 1500 4.3L Unknown VIN: 1GCEK14XX3
hello i can't tell you what is wrong becouse i don't know.i have been working on this 03 silverado 4x4 for 2 weeks & can't figger out the problem is. When you stop the truck trimbles all over like you are driving on a wash board.The front hub assy are new, fro...
2005 Chevrolet Silverado 2500 HD 6.6L steering pump VIN: 1GCHK23275
Hey out there,short week! I've got this duramax 4x4 and customer complained about noisy steering when turning lock to lock but it stopped doing it when it got here. There is a barely audible whine I just heard today but not sure if this would justify replacing...
2006 Chevrolet Silverado 2500 HD LT 6.6L Cooling Systems VIN: 1GCHK23D26
Hoping some diesel tech can help point me in the right direction here??? Ten minutes before quite time this truck comes in dumping coolant out as fast as you can put it in,as far as I can see its in the rear of engine,if you look in its above the oil filter an...
2009 Chevrolet Suburban 1500 LT 5.3L Stall VIN: 1GNFK26389
I have a Suburban with 5.3l that came in on the tow truck died out in the evening before when we had 90 degree weather. The next morning would not restart. I scanned the engine 1st got the codes pulled, reset codes and the car started. I next ran the fuel pres... Trouble codes: P0171, P0174, P0300, P069E
2010 Chevrolet Tahoe LS 5.3L Unknown VIN: 1GNUCAE03A
This is a repeat customer of mine. Story goes, they had aftermarket fog lights installed and customer claims that ever since then, the vehicle has been acting up. Symptoms are like it loses they data bus somewhere. Guages start flickering and going crazy, all ...
2002 GMC Sierra 2500 HD SL 6.6L Drive or Reverse operation cold. VIN: 1GTHK23162
Truck came in with multiple codes: P0701 Transmission Control System Performance, P0846 Solenoid D Circuit Stuck open, P0848 Solenoid D circuit high. Truck would just rev up after going from park to drive or reverse. If you revved it long enough it would final...
1998 Oldsmobile 88 Royale 3.8L No Start, Stall VIN: 1G3HN52K4W
car was towed in for a no start concern with codes p0108 and p1106. Replaced sensor with one off of a car on the lot and sensor read 1.56 volts at idle, drove good, ordered new MAP sensor, installed and vehicle won't start and MAP is reading 4.56 volts with ne... Trouble codes: P0108, P1106
2008 Pontiac G6 2.4L steering torque sensor VIN: 1G2ZG57B68
please help!this car came in with noisey electric steering motor and and steering wheel would bump back and forth on its own.has code c0545(steering torque sensor input). I checked all wiring and connections found no problems.Recalibrated steering wheel positi...
2005 Saturn Vue 2.2L no start, no comunication with ECM VIN: 5GZCZ23D75
Vehicle in shop for a no start condition, but started fine. Stored P1599 in ECM. Rechecked next morning, no start or comunication with ECM. Pushed into bay then started right up full comunication with ECM no DTC's. Verified integrity of previous wire repair, c...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Chevrolet Trailblazer EXT LT 5.3L No Start VIN: 1GNET16M85
THANKS EVERYONE: in doing research I found that the rpo code lh6 vin code m calls for aluminum block and 24x crank sensor/1x cam reluctor for years 2005-06 . The engine builder installed a 58x and 4x combo thus causing this whole mess , in addition the black... Trouble codes: P0335 (Crankshaft sensor circuit).
2009 Chevrolet Silverado 1500 WT 4.3L spark knock VIN: 1GCEC14X49
Here is what we did: First we disconnected both knock sensors and monitored the scan data with the vehicle in gear. Load was 91%, MAP was 81 kpa, MAF was at 11.86 gs, TP was at 22%, RPM was 540. These indicated that the engine was under a very heavy load. ... Trouble codes: P0326.
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