GM Automotive Technicians Technical Discussion and Fixes for Mar 27, 2013 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2000 Buick Regal LS 3.8L Trac Control VIN: 2G4WB55KXY Looking for information on the Variable Effort Steering. I'm getting a code c1241. I'm also getting a c1232 left speed sensor open or shorted. When monitoring the left sensor with a scan tool it shows as good. Also when cycling the ignition key from off to on ...	View
	2006 Buick Rendezvous CXL 3.5L 5 volt reference VIN: 3G5DB03L26 Vehicle was towed in as it would start and die. Multiple codes- cleared engine started and idled rough and ran rich, checked data stream noticed Map was at 28.5 kpa and would eventually get to 19kpa. Disconnected and checked voltages at connector and found 10.... Trouble codes: P0641 (5 volt reference circuit 1)	View
	1999 Chevrolet Silverado 1500 5.3L Abs Module VIN: 1GCEC19T1X 1999 Silverado-2wd-5.3-100,000 miles. While driving vehicle abs and parking light came on--codes C0222-R/F wheel signal missing,C0226-L/F wheel signal missing and C0265-EBCM. read TSB's on it and cleaned sensors, connections at EBCM and redid ground connection...	View
	2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNES16S73 Hello every one, i have a chevy here that came to me from another shop. Owner said it had been misfiring so he had plugs changed and plug wires as it also had loss of power. I checked the basics such as filters, fuel and air and oil quality,all were good but t... Trouble codes: P1137, P0300, P0756, P1512, P1516, P1515	View
	2004 Chevrolet Suburban 1500 LS 5.3L Rt Outside Mirror VIN: 3GNFK16Z84 Truck came in power mirrors inop, they would fold. The left/right switch was broken. We replaced drivers door switch assy with new GM part. The drivers mirror works but passenger side does not. Still power folds but no lt/rt or up/dn. The scanner sees the swit...	View
	2006 Chevrolet Impala LTZ 3.9L Heat VIN: 2G1WU58116 Hi everyone, please be paitent as this is the first time working on one of these with an electric water pump, This vehicle has heat at cruising speed but I wouldn't call it great, at idle there is almost no heat, road test with scanner, no codes and coming up ...	View
	2007 Chevrolet Cobalt LT 2.2L Lighting VIN: 1G1AL55F57 We have a short that is turning on the park lights and reverse lights real dim.So far we have traced the wires and when moving the harness in dash towards cluster light will go out.We may have to remove dash tommorow but thought somebody may of had the same is...	View
	1999 GMC K1500 Suburban SLE 5.7L MIL Lamp on VIN: 1GKFK16R5X Guys I Have had this truck in for service and Check engine light. Replaced Plugs cap rotor coil and module. Test drive and start everyday for a week all O.K. Customer picks up calls next day Check Engine light on P1351 again.Check all conections at module and ... Trouble codes: 1351 (Ignition Coil Circuit High Voltage)	View
	2007 GMC Acadia SLE 3.6L MIL Lamp on VIN: 1GKER137X7 Hi everyone , i have this gmc acadia w/the 3.6 engine this vehicle came to me w/the code p016, the customer sates the other shop has replace both int. cam sensors and int. cam actuator solenoids and i have confer that. so i tested the solenoids and i can hear ... Trouble codes: P0016 (Crankshaft Position CKP - Intake Camshaft Position CMP Correlation Bank 1)	View
	2008 GMC Sierra 2500 HD SLE 6.0L Fuel tank won't fill This truck takes FOREVER to fill up. I have to have the fuel nozzle right out of the filler neck and only squeaze the pump slightly to get anywere when filling. I have tried another pump with the same results. I work at the local road maintenance shop and this... Trouble codes: P0446 (EVAP control vent circuit)	View
	2003 Hummer H2 6.0L shifting VIN: 5GRGN23U13 need help from gm tranmission technicians - i have this hummer stuck in 3rd gear with code po758 - and the letters for prnd123 in the cluster-gauge are visible.or inop.thank you.	View
	1989 Pontiac Firebird Trans Am 3.8L Misfire VIN: 1G5FW2177K i have my own personel ta here that when its below 40 degrees it runs rough and full throttle like its running lean, bucks jerks and cuts out wont do it if it warm outside! dont have alot of time to work on it so just wandering if any body has ran into this ki...	View
	2003 Saturn Vue 2.2L Unknown VIN: 5GZCZ43D53 hi everyone to day we have this pos that will not shift gears scan engine control module fund p0700 scan tcm fund no codes looking at PIDS on tcm there in test drive ISS works OSS all so works but vehicle speed reads 2 MPH at all times on scan PID from TCM but...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2002 Buick Rendezvous CX 3.4L 2-3 shift VIN: 3G5DB03E42 thanks guys i informed the customer a rebuild was needed.they decided to replace the car	7
	1999 Chevrolet Cavalier LS 2.2L engine block VIN: 1G1JF5243X i took another look again last night.that part was the oilpump drive.i pressure tested again and looked at where the head meets the block with a mirror and the headgasket is leaking.thank you everybody for your help.	15
	2005 Chevrolet Astro 4.3L Stall VIN: 1GCDM19X35 I actually posted this for a buddy. He originally wrote the post. When I asked him to write a paragraph explaining the fix he wasn't very helpful. He said it was a compilation of many things that helped with the problem (I guess all the repairs he had done?...	16
	2010 Chevrolet Suburban 1500 LS 5.3L Poor Idle Quality VIN: 1GNUKHE3XA I want to thank all the techs who responded with good, helpful information, the vehicle is now running fine after I recorded code information, I cleared them. Over the next few days, I drove this vehicle over thirty miles while monitoring fuel trim and watchin... Trouble codes: P0011 (intake cam position), P162B, P0131 (O2 signal low B1S1), P0133 (signal slow B1S1), P0137 (O2 signal B1S2).	10
	2005 GMC Envoy SLE 4.2L cruise VIN: 1GKDT13S25 The customer hasn't returned to further diagnose, I think the VSS is on the right path and if they come back in we will certainly be looking closely in that area. Thanks for all replies.	11
	2006 GMC Envoy Denali 5.3L Misfire Thanks everyone for all of the advice we removed the intake and it turns out that one of the cam lobes for number one cylinder was wiped out jasper engine installed and out the door 5k cost for cust. but has a 3yr 100000 warn, parts and LABOR again thanks to ... Trouble codes: P0301.	19
	2007 Saturn Outlook XR 3.6L No Start, Poor Idle Quality, Stall VIN: 5GZER33707 I want to apologize to everyone who wasted the time to read my concern - I should've gone back and checked my work first. All of you were right, the rear plenum gasket moved on me and created a vacuum leak. Those long bolts are what caused it. They sure did...	5

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