GM Automotive Technicians Technical Discussion and Fixes for Nov 20, 2006 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1996 Cadillac DeVille 4.6L Starting VIN: 1G6KD52Y1T This vehicle was driven into the shop with a battery drain problem, we found the a/c control panel to be defective and since it is another shop they brought us a another complete cluster. We replaced the entire cluster. Now our problem...we get a "starter disa...	View
	1993 Chevrolet K2500 Suburban Silverado 5.7L Speed Sensor VIN: 1GNGK26K0P Hello all, I will try to keep this sort, The speedo works always on the dash but the complaint is the trans will not shift from 1st until truck is warmed up at which time it seems to work like there is No problem, the only code is 24 VSS Error... The concern o...	View
	1995 Chevrolet C2500 Cheyenne 7.4L Hesitation, Cuts out, Stall VIN: 1GCGC24N1S another shop states tk. caught on fire in air cleaner,burned harness. tk. would not stay running after repair.i've ck.for correct ign timing and its on the money, vac&fuel pressure are ok,ck pid voltage at pcm w/koeo and are in specs of manual.ck.powers and gr...	View
	1995 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Poor Fuel Economy vehicle came in with a"hesitation". we found a very bad stumble. spark plugs were old & worn-we replaced along with wires. tested fuel pressure 45 psi at rail- a little low so we replaced pump & filter. o2 sensors change consistently, fuel volume good, no code...	View
	1997 Chevrolet C3500 Cheyenne 5.7L Surge VIN: 1GCHC33R0V This is a buddy's truck. Thought I would see if anyone has seen this problem before. It all started when he drove back east to pick up a boat. On his way back everything was going real good, but it started to develope a off idle rpm surge. If you ease into the...	View
	1997 Chevrolet Cavalier Z24 2.4L Misfire, MIL Lamp on VIN: 1G1JF12T5V good afternoon everyone. i have a problem with this cavalier. it eats up a coil housing about every month.i havge replacede three housing in the last three months.both coils/igntion module/cam and crank sensors have been replaced.so have plugs and plug boots.m... Trouble codes: P0300	View
	1999 Chevrolet Monte Carlo LS 3.1L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 2G1WW12M0X Hello and thank you in advance for any help. After Installing new engine due to spun camshaft bearing, CEL came on with code PO336. Scan tool showed irratic RPM. I have seen the scan tool show 24x sensor drop to 77 r.p.m.s Engine typically runs fine. Sensor ph... Trouble codes: P0336	View
	2002 Chevrolet Trailblazer LS 4.2L int draw VIN: 1GNDT13S22 this truck came in with a new battery installed, customer said truck wouldn't start later that day. we got it in and went through starting and charging tests. we found that it had a draw that would stay around 2.7 amps after everything powers down. after pulli...	View
	2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK292X4 Diesel and GM techs ...help ... We've had this truck in here a few times with an intermittent MIL .The first time we got P0652/p2228/p2563 .The second time it was p0652/p2138/p2140 and p0228 .All checks out fine when we scan the datastream , but codes seem to ... Trouble codes: P0652, P2138, P2140, P2228, P2563	View
	1986 GMC cab over 231CID Excessive Emissions VIN: J8DB4B1H6G This is an old Isuzu turbo diesel that failed the emissions - the opacity limit is 55 - it came in with a failed reading of 85 - we have been able to replace fuel filter / air filters and change oil and oil filters and the diesels usually clean right up - this...	View
	1994 GMC K1500 Sierra SL 5.7L hot/ cold button VIN: 1GDEK19KXR this customer brought in a new heater core. we installed the heater core and a evap core. when we re assmbled the system the heater controls would work for a minute then all the arrows on the hot cold bar would flash. if you hold down the max button it will st...	View
	1997 GMC Savana 3500 6.5L Poor Idle Quality, Hesitation VIN: 1GTHG39F9V It was running fine untill I filled it up with shell fuel this morning. It started up fine and drove good for about a half hour and parked it. I started it up about an hour later it started fine but there seems to be no power the pedal to the metal and still n...	View
	2002 GMC Sierra 2500 HD 6.0L No Start VIN: 1GDHC24UX2 This GMC 2500HD has been in a couple of times with a dying while driving intermittent condition. The 20 amp fuze marked ECU B blows and when the driver installs a new fuze it starts up and runs for two weeks until the fuze blows again. We cannot find any probl...	View
	2003 Pontiac Bonneville SSEi 3.8L Accessories VIN: 1G2HZ54143 greetings everyone. another nightmare is here i was removing the intermediate shaft,and ended up pulling the cluster thinking it would give me mor room anyway.a small job gone bad. now all assembled some of the dash backlights are out. this dash is non servic...	View
	1995 Saturn SL1 1.9L shifter VIN: 1G8ZH5280S Hello techies this car is hard to get out of park when cold. we found some info from Identifix that talks about replacing the shifter assembly after testing the BTSI solenoid which we did. My not so great Saturn dealer isn't sure want i want. can anyboby help...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K1V Thanks for all the replies. I tried the updated plenum from Auto Parts Network, decent quality and the updated EGR tube seems like an improvement, hopefully it solves the origional problem and for $96 with everything it was worth a shot. Oil was leaking inside... Trouble codes: P0306 (Cylinder 6 Misfire 2263 RPM 48MPH MAP 28.6 ECT 207 STFT 8.6 LTFT 10.2 Load 30.6 Closed Loop.).	25
	1998 Buick Park Avenue 3.8L Mechanical VIN: 1G4CW52K6W sorry been busy forgot to close the help request. i forgot the pcv in the old intake thanks every who responded.	42
	1989 Chevrolet S10 2.5L No Start VIN: 1GCBS14E2K Hello all I got a ton of responses on this one. As most everyone let me know, there was a hall effect switch inside of dist. that had went bad. We used the test method that was sent to us by using a test light on B+ and touching the hall effect circuit wire to...	33
	1998 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W8W Thanks to the masses for all the great reply's. Too many to thank individualy, but the majority of thoughts was that the distributor was off by one or more teeth. After checking and verifying proper alignment, I did a fuel injector leak down test, by charging ...	23
	2002 Chevrolet Blazer LS 4.3L Poor Fuel Economy VIN: 1GNDT13W62 It was as most of you guys said. A leaky injector caused the fuel to run thru the wire because the weatherpack had contained the fuel and there was nowhere else it could go. Put 6 injectors and regulator and repaired wire from injector connector(swells up the ...	27
	1998 GMC C3500 Sierra SL 7.4L Clutch VIN: 1GDKC34JXW well...the dump truck is gone. Installed new GM slave cylinder and master. Bench bled the master off the truck. All is well. Thanks for the help.	7
	2003 GMC Yukon XL 1500 SLT 5.3L Bose Amp VIN: 3GKFK16Z93 Thanks to Tim [...], We found nothing @ the rear heater control. Pulled the counsole and found the plug to t...	3
	2004 GMC Yukon XL 1500 SLE 5.3L Hesitation VIN: 1GKFK16ZX4 after test driving for an extensive period of time was unable to duplicate fault. forgot to say fuel pump and filter were already replaced due to tech bull. a year ago. will reply after fault becomes more prevailing.	5
	2001 Oldsmobile Aurora 4.0L magna steer VIN: 1G3GS64C31 The customer chose not to perform a fix at this time due to not being a safety item, and only happening on the highway. We told her we needed to do intrusive testing, and the approximate cost of testing. She declined further testing. Here is a summary of the r...	4
	1996 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2TB1241T hello all tech, thank you all, you great techs.Vicken [...] of Alberta who search the archive and came up with same exact problem I had.Yes, I had to disconnect the battery cables for one hour,t... Trouble codes: P0440.	15
	1998 Saturn SL2 1.9L Cuts out, Stall, MIL Lamp on VIN: 1G8ZK5274W Well, I wish we had a fixed vehicle, but the time is running out on this post and the car is still here. We replacd the coolant temp. sensor and pigtail due to minor corrosion, no change. We replaced the computer with a known good part, no change. We even repl... Trouble codes: P1599 (powertrain stall), P0744 (tcc circuit intermittant).	7

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