GM Automotive Technicians Technical Discussion and Fixes for Feb 27, 2012 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2002 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP54K32 Have read through knowledge base, tried other fixes, still continues to die at will. Looking for direction.	View
	1994 Chevrolet Astro CL 4.3L Engine VIN: 1GNDM19Z7R This van came in as a no start, it cranks but will not fire, i listened for fuel pump and did not hear , check for power , there is none, also the head lights dont work, nor the horn,i am sure it is a electrical issue , but not sure where to start , thought ma...	View
	1998 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W2W Used truck - was sold got towed in 3 days later for crank - no start. nitial observation - fuel pressure was 60 psi. Spark was intermittent. Plugs ar eplatinum but fuel fouled. Had a stored code for crankshaft position sensor. Removed sensor and found the tip...	View
	2001 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK23191 This is not a help request just wanted to let other techs know. I had a 6.6 duramax was leaking fuel from fuel filter housing at heater connector. Truck shut off would not start. Chevy wants over 500 dollars for new housing so took off housing and took apart. ...	View
	2002 Chevrolet Impala LS 3.8L Turn signals and brake lights VIN: 2G1WH55K72 At very random times and only after sitting a few hours, I can only duplicate the problem with my foot on the brake - hit left OR right turn signal, and all related lights light up but simply don't flash. Left or right makes no difference - either they all wor...	View
	2004 Chevrolet Silverado 1500 5.3L Driveability VIN: 2GCEK19T34 Customer says he was driving truck with no problems. Customer states that he uses the truck to plow his driveway, put the plow on, plowed driveway. While plowing he became stuck and had to put it into 4WD LOW and rock it a few times to get it out of the snow b...	View
	2007 Chevrolet Tahoe LTZ 5.3L Misfire VIN: 1GNFK13067 Thanks in advance,I have this 07 tahoe that has v4 cylinder deactivation and it came in for some front end work and exhaust manifold gasket(r/side).It was here for a few day after work was done drove great.Customer takes it and 2 days later comes back with eng... Trouble codes: P0300, P0306	View
	2008 Chevrolet Uplander LS 3.9L compressor VIN: 1GNDV23178 This vehicle came in with the a/c not cooling well. The high side pressure at idle would quickly go to 450psi and the compressor would shut off. We decided that since the service port was between the condenser and the front expansion valve that it must be rest...	View
	1993 GMC C2500 Suburban 7.4L Cuts out VIN: 1GKGC26N8P falls off at fuel throttle and slight back fire,lift slightly and runs better,has new tune up all ign parts,fuel injecters and pump and reg kit,egr plugged,new map and tps,intake new and gask,vehicle has had converters romoved and 2.5 dual exhaust installed pr...	View
	2004 GMC Sierra 3500 SLE 6.6L No Start VIN: 1GDJK34194 Truck will not start at all until you add carb cleaner. Even after you have veh. running it will not restart immediately after turning off key.	View
	1989 Oldsmobile 98 Regency 3.8L high idle VIN: 1G3CX54C8K hello to all and thanks in advance for any help. this car came in with an ittermitant high idle,customer stated that ocasionally at a stop in gear car will increase rpms and try to take off by itself. this may be coincidence but she said it didnt do it till sh...	View
	2003 Saturn Vue 2.2L odometer VIN: 5GZCZ43D73 I have this 04 vue, vehicle came in with evap vent solenoid non functional. found the pin in the ecm for the vent control circuit broken off. Bought used ecm and when installed i turned the key on and the odometer is clocking miles like crazy, thought i just g...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1997 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HR52K9V Thanks to all who responded to my help request. Unfortunately, the customer declined any further diagnostics. Trouble codes: P1406 (EGR Pintle Position Circuit Problem).	22
	2003 Chevrolet Silverado 1500 4.8L Passenger Position Sensor VIN: 2GCEK19V13 After going backwards and forwards with tests of various circuits,I went ahead and replaced the seat. This took care of the problem with the passenger presecne system. The engineers have way too much time on their hands and keep adding things to these vehicles...	6
	2003 Chevrolet Silverado 2500 6.0L Hesitation, MIL Lamp on VIN: 1GCHK24U13 Thanks to all the replies they were all very helpful. This is one of those problems that makes you want to pull your hair out. I talked to a local rebuilder who said the valve seats on some of these 6.0L become out of round and will cause an intermitant misfir... Trouble codes: P0101, P0200.	25
	2004 Chevrolet Corvette 5.7L MIL Lamp on thank you to everyone who replied to this request, reinstalled origanal air intake set up & replaced the maf (to far gone for cleaning)RESET FUEL TRIMS CAR RUNS GREAT ! Trouble codes: 174 (bank2 lean-[...]-15), 171 (bank 1 lean-lt trim avg 13-15).	13
	2006 Chevrolet Avalanche 1500 Z71 5.3L blower motor thanks to all that responded. sorry this has not been closed. my problem is almost identical to Scotts. If you turn the controller off before u turn of truck it will work.. My customer has not been back since it is working well enough for him. than...	12
	2006 Chevrolet Silverado 1500 LT 4.8L No Start VIN: 1GCEK14V26 ALL PLUGS FLOODED,REPLACED PLUGS TRUCK IS DOWN THE ROAD	15

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