GM Automotive Technicians Technical Discussion and Fixes for Mar 12, 2012 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2004 Buick Century Custom 3.1L abs VIN: 2G4WS52J44 have had this car as a problem car always right front wheel speed sensor .. have replaced the hub and bearing twice and replaced the wiring under the fender , still get and ocasional code C1232 ..LEFT FRONT WHEEL SPEED SENSOR , now also getting a C1218 PUMP MO...	View
	1995 Cadillac Seville SLS 4.6L Stall, RPM limited VIN: 1G6KS52Y3S This car will shut engine down or limit the RPM because the computer thinks it's running hot, when engine is at operating temp of 195F display shows 260. I'm leaning toward bad computer but wanted to get some ideas from the IATN team, thanks in advance!	View
	2003 Cadillac DeVille 4.6L tcc code 741 VIN: 1G6KD54Y83 after driving 20 30 min.check engine light on.tcc code again.vehicle came in shop with exact same problem.help me if u can	View
	1996 Chevrolet Tahoe LS 5.7L Backfire when starti VIN: 1GNEK13R9T This one has me puzzled. Intermittantly this tahoe will backfire/kick back when cranking. Sounds like the classic crank sensor problem right? there are no sensor codes, sensor has been changed twice, just changed this weekend. Checked clearance and shimmed. Re...	View
	2003 Chevrolet Monte Carlo SS 3.8L Starting VIN: 2G1WX12K63 No crank condition no codes present went through all data repair list came up with bad pcm but it did not correct the problem	View
	2003 Chevrolet Silverado 2500 HD 6.6L starting VIN: 1GCHK29183 This truck is hard or wont start most the time ,it came in first had code to service fuel injection, then a code for fuel pressure regulater, gm parts dealer told me the regulater is on the pump and cost almost half what a rebuilt pump ,so i install a gm pump ...	View
	2005 Chevrolet Malibu Maxx LT 3.5L starter VIN: 1G1ZU54865 The remote start has stopped working. The remote was just replaced and the dealer says that it is sending the signal to start the car with the remote. The other functions of the remote work fine. I scanned the car and found p0826 code saying the tap up/down sw...	View
	1990 GMC C1500 Sierra SLE 5.7L Poor Idle Quality, Cuts out VIN: 1GTDC14K5L Customer complaint is the vehicle doesn't run. I got in and it fired right up. Ran it for awhile and it bogged down momentarily and then back to running fine. I cought it on the scan tool. Sitting in the bay at idle, RPM went to 0, O2(mv) went to 0, Integrater...	View
	2004 GMC Canyon SLE 3.5L incorrect mileage VIN: 1GTCS14664 This truck came in with.Interior lights staying on, and horn was inop.I replaced the bcm.Then the mileage stayed at 46876.So after testing everything,the ipc was bad.I replaced the ipc.Now the mileage is working, but it started at 0.I let customer drive it,bec...	View
	2005 GMC Sierra 3500 SLE 6.6L low power VIN: 1GDJC33275 this truck came in with code p1093 in history, light off. We have a tech2 so ran frp up to 160mpa, no problem. Power brake in shop also no problem but on the road any heavy request pulls frp back to 7500psi. If I let up it will come back and run fine until I g... Trouble codes: P1093	View
	2006 GMC Envoy SLT 4.2L drivers door control module VIN: 1GKDT13S96 Replaced the module and a blown DDM fuse (10 amp). Checked the circuit breaker and it is fine. Power to the drivers door module but nothing will work on the drivers door. What am I missing here? I have re-ordered another new module from the dealer and will rec...	View
	2002 Saturn SL2 1.9L w/bearings Hey all, sorry, didn't grab the VIN...Regular customer of ours has an 02 saturn sl2. In the past 80k we have put six front wheel bearings in it. We have tried different brands of bearings, the knuckles are clean, the bearings go in with no unusual effort. we h...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2004 Cadillac DeVille DTS 4.6L Trunk Springs VIN: 1G6KF57984 First of all, I would like to thank all replied. All the ideas would have worked and did. I took vehicle to my local body shop and had them tension the springs. Nobody got hurt and we didn't have to fabricate anything. Thanks again!!!	6
	1990 Chevrolet Lumina 3.1L Stall, no power VIN: 2C1WN54T8L Hi guys, Good lord! Over seventy replies! Wow Thanks guys!!! First day back at the shop but I had to leave my friend's car without a total fix. I printed off every response and gave to my friend to investigate. Today i recieved a phone call saying that the...	71
	1996 Chevrolet Blazer 4.3L hard start - cold VIN: 1GNDT13W3T Gentlemen This car is fixed and starting fine. We wound up installing a new fuel pump and according to the owner he is satisfied with how it starts. However after we installed the pump I was not sure we got it right as the cold crank time was to long for me....	34
	1996 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC124XT Greetings, After hours of head scratching and being bent in in strange positions, we think we have this one knocked out. Some members stated to check grounds and moduals. we found that the main ground strap from the battery to the body and battery tray had a ... Trouble codes: 1601 (loss of serial comm).	9
	2002 Chevrolet S10 2.2L Timing Chain VIN: 1GCCS19502 Well I am calling this fixed. When we opened it up for the third time; the timing chain tensioner was broken. We have replaced the tensioner each time we replaced the timing chain. But of course each time was with aftermarket parts. We do not detect play in th...	13
	2008 Chevrolet Silverado 2500 HD WT 6.6L rear end VIN: 1GCHK23698 After talking with my local dealer I think this might just be a "condition normal" situation. But the condition is quite severe, much worse than I have ever felt from any other truck. There is a severe clunk, bang when shift out of 4 wheel drive and back up re...	14
	2008 GMC Envoy SLT 4.2L Light comes on VIN: 1GKDS13S08 Thanks to all who responded, the majority of which agreed that the sensor was probably the problem. The customer is moving to Pittsburgh and decided to have me put on a new Steering angle sensor. I installed the new sensor and true to my intuition it read 0 d...	5
	2006 Saturn Vue 2.2L Mil VIN: 5GZCZ23D86 Thanks for the replys guys. This code did not come up again after being cleared and taken through three drive cycles. I do not know why it was there. We tried another scanner and it didn't display that code.	7

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