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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 22, 2014
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Open Help Requests for GM
Help Request Answers
1997 Buick Park Avenue 3.8L Power Windows And Door Locks VIN: 1G4CW52K0V
Cust compains of no power lock or window fuction until car is driven for 20 min. After checking i noticed that all functioned w/key on but not w/engine running i then noticed that if alternator is unplugged while engine is running all locks and windows start t...
1990 Cadillac Eldorado 4.5L Poor Idle Quality, MIL Lamp on VIN: 1G6EL133XL
Vehicle came in with service code for intermittent "distributor pickup". So verified with scope and purchased 1) Reman distributor, now rough idle and code 41 cam sensor. purchased new Rich Porter Distributor, came apart in my hands... #2 reman distributor, us... Trouble codes: 41 (Camshaft position / reference sensor)
2003 Chevrolet Silverado 1500 4.8L engine VIN: 1GCEC19V03
this vehicle came in with about 6 codes and the message reduced engine power on the cluster. I then changed the throttle body, app sensor, tac module and the connector to the throttle body had already been replaced. after I drove it down the street the same th...
2009 Chevrolet Corvette 6.2L Speedo drive VIN: D000015749
This car is actually registered as a 1959 Corvette, which is what the body looks like, but there is very little Corvette content. The iatn program couldn't handle the VIN, which originated in Missouri. According to the customer, the speedometer has never worke...
2012 Chevrolet Cruze LS 1.8L Electric power steering VIN: WCA1223450
Is personal vehicle and don't work on domestics..the problem is that I loose power steering for a moment and radio cuts out specifically when turning and engine is hot. The only fault is c800-03 low power supply in the electronic power steering assist module. ...
2001 GMC Sierra 1500 SL 4.3L Hesitation, MIL Lamp on VIN: 1GTEC14W41
vehicle came in with lack of power and missing with miss fire code mas air flow at idle 7.91 g/s 2.05 volts ST b1-50 b2 0.8 LT b1 -9.4 b2 10.2 intermitten flashing service engine light Trouble codes: P0300, P00, 420 (cat eff), P0101, P0102
2003 Pontiac Grand Am SE 3.4L Cruise control VIN: 1G2NG52E23
In trying to dix a cruise control issue. The PCM has been replaced. The CC module has been replaced. The cruise control now works if the inhibit signal is commanded off with the scan tool but without the scanner commanding it off it displays CC Cancel switch a...
2004 Pontiac Bonneville GXP 4.6L temp. gauge VIN: 1G2HZ54YX4
Good day to all , please help. I can't find the temp.gauge sending unit. I did find the temp. sending unit for the computer on the left rear of engine in the head. Coolant fans work and when gauge goes to the top the reading on the scanner is OK. I unplugged t...
2004 Pontiac Grand Am SE1 3.4L Engine VIN: 1G2NF52E84
Car brought in for with a bad misfire and would stall after warm up. Customer requested a new catalytic converter be installed(recommended by someone else). Changed out cat, no change. Customer then requested I preform an diagnostic. Checked codes; P0300. Save...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Eldorado ESC 4.6L Performance VIN: 1G6EL12Y6X
The aftermarket condensor was the issue. Put in a Delco Condensor and had a 20 degree drop at idle - ambient 80. down the highway would freeze you out about 40 degrees. Boss wasn't happy with that. had us put in a Delphi compressor with no change. My thou...
2001 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K81
Well, this is one for the books. This car was purchased a year ago from one of my account used car dealers. At the time of purchase it was fine. The owner replaced the radio with an aftermarket radio. Then his troubles began as the radio is an integrated part ... Trouble codes: P0336 (Crankshaft position sensor A circuit range / performance).
2008 Chevrolet Cobalt SS 2.0L No Start VIN: 1G1AP18X88
Problem solved. The fuel was full of water, enough that only about 1/8" of fuel in the top of the tester. A couple of notes for those searching in the future. The engine will start with very low fuel pressure. I disabled the low pressure fuel pump and was able...
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