GM Automotive Technicians Technical Discussion and Fixes for Dec 10, 2013 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1987 Chevrolet V10 Custom Deluxe 5.7L Stall, VIN: 1GCEV14K5H Customer complaint of intermittent stall or dying when trying to pull out after releasing clutch pedal. It will occur worse when engine gets hot and trying to pull out off idle. I have confirmed this happening during roadtest of vehicle 3 times and have notice...	View
	1998 Chevrolet Cavalier 2.2L Unknown VIN: 1G1JC1249W car runs rough. tested compression 200, 145, 150, 125psi. Removed the egr and blocked off, still ran rough. replaced the plugs, wires, ignition mod, coils no change. Checked timing it was dead on. ran car on a different fuel source had no change. Tested for a ...	View
	2006 Chevrolet Impala LT 3.9L Poor Idle Quality, Surge, Misfire, MIL Lamp on Vehicle came in with ABS/trac light on and CEL. Vehicle had an engine noise, sounded like a ticking/knocking from B1 under valve cover area. Also found waterpump and crossover gaskets were leaking but no sign of overheating. Passes block test for head gasket l... Trouble codes: P0300, P0011, P0016	View
	2009 Chevrolet Traverse LS 3.6L Mechanical VIN: 1GNEV13D99 This vehicle was towed here with an internal transmission failure. Engine ran fine but the transmission went out. We quoted them a Jasper and got the job. During the transmission replacement, while turning the engine over by hand to remove the torque converter...	View
	2010 Chevrolet Aveo LS 1.6L Starting VIN: KL1TD5DEXA Customer state vehicle does not crank over intermittently, more frequently during cold weather. Once it start up for the day vehicle will start normally until the next day. This is our second day with the vehicle. Vehicle came off the truck with a no start/no ...	View
	2001 GMC Sierra 1500 SL 5.3L Sensors Or Hubs VIN: 1GTEK19T01 This vehicle came in with a complaint of low speed ABS activation. I road tested truck to confirm complaint & checked for codes. No current or history codes in memory. Performed TSB cleaning procedure & road tested truck. ABS light came on with first stop. Che...	View
	2004 GMC Savana 3500 6.0L Trac Control VIN: 1GJHG39U14 Greetings. This van has had an intemittant fault in the abs/etc/esc system which up until now only the owner experienced. When accelerating lightly from a stop if you let up on the throttle and then applied it again quickly the trac control would kick in and ...	View
	1990 Oldsmobile 98 Regency 3.8L Column VIN: 1G3CX54CXL i installed a used steering column in this car a number of months ago. The ignition cylinder started giving problems so i installed a new cylinder. Thats when every thing went down hill.about a month later,owner came in & said the wheel was sticking & making n...	View
	1992 Oldsmobile Toronado Trofeo 3.8L Instrument Cluster VIN: 1G3EV13L2N Hi everyone we have a 92 Olds. Tornado that has come in with the complaint of not lights on the dash. The light switch which contains the dimer was falling apart so we replaced it with a know good one. We took the instrument cluster out to see if the bulbs wer...	View
	2008 Pontiac G6 3.5L Low Washer Fluid Level VIN: 1G2ZG57N28 I replaced the low washer fluid level sensor but the message center on the radio still says that the washer level is low. I checked both the ground wire at the connector and the voltage line going from the sensor to the fuse box and there is no broken wire. I ...	View
	2007 Saturn Relay-1 3.9L No Heat VIN: 5GZDV53107 Vehicle came in with no heat at all, after replaced water pump & thermostat, heater works good at cruise. But no heat at idle. Also notice that 2 metal pipes along the front valve cover ( these pipes route to the heater core)turn cold when there is no heat. C...	View
	2008 Saturn Sky Red Line 2.0L cylinder block VIN: 1G8MG35X38 We are waiting for the customer to decide if the vehicle will be repaired and by who but need to determine if our diagnosis is correct...	View
	2008 Saturn Astra XR 1.8L Hesitation, MIL Lamp on VIN: W08AT67168 Customer complaint of CEL ever since we replaced cam phasers, actuators and timing belt approximately 30k ago. Customer states that vehicle ran better after that work was done than ever before, so he never brought it back for the CEL. He came back last week fi... Trouble codes: P0016 (CKP/CMP correlation fault / signal invalid intake camshaft)	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1998 Chevrolet K1500 Silverado 5.7L Excessive Emissions, Surge, Cuts out, Stall, Misfire, MIL Lamp on A huge Thank You to everyone who took the time out of your day to reply to this. After much thought I opted to install a new Bosch fuel pump. This fixed the issue. The Bosch is putting out 63psi consistently and the truck is back to its owner and running gr...	28
	2003 GMC Safari 4.3L battery VIN: 1GDDM19X43 Thanks for the immediate responses guys, great input... Some customers are a little tougher than others, had to get this thing out... Anyway it turns out I had a burn to a second lead to the starter where the alternator feed comes in (inline fuse). That's why ...	8
	2003 GMC Safari 4.3L battery VIN: 1GDDM19X43 Thanks for the help guys... in desperation I mistakenly posted twice, sorry. Anyway it turns out that the culprit was a burn to an inline fuse lead to the starter where the alternator feed comes in. That's why when I disconnected the alternator feed the draw ...	6
	2007 GMC Acadia SLT 3.6L MIL Lamp on VIN: 1GKER33727 Well I would like to thank everyone for replying to my help request. This vehicle really ate my lunch for a few days and I am happy to say that it is now fixed with the help from all of you. I should have put in the description of testing that I had tested th... Trouble codes: P0171, P0174.	12
	1995 Pontiac Firebird Formula 5.7L Excessive Emissions VIN: 2G2FV22P3S I want to thanks to all that respond to my post. But , the first thing I have to do is Apolize for my lack of info, in the post. I should done a few thing before posting. This car has Edelbrooks exh. header , there is CARB EO NUMBER 215, & Model number...	17

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