GM Automotive Technicians Technical Discussion and Fixes for Mar 2, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2001 Buick Park Avenue 3.8L Chimer VIN: 1G4HR54K92 Hello! Customer is complaining that the interior chimer is to loud. I am wondering if the volume is adjustable thru the scan tool or if that's just the way they are. Alldata has no info. and I didn't see anything in the fix database either. I should add that i...	View
	1997 Cadillac Catera 3.0L No Start VIN: WO6VR52R3V Buddy of mine just got this at auction and I got roped in on this. Has the word "SECURITY??" scrawled across back window.Hooked up Tech 2 got no scan data, no MIL on dash. Can communicate with other modules.Unplugged tps for laughs measured B+ B+ and 9v on the... Trouble codes: P1503 (Theft deterrent password incorrect), P1564 (Long term reset), 13 (immobilizer system Module not programed)	View
	1999 Cadillac DeVille 4.6L fuel door & trunk lid Hello all, This caddy's fuel door and trunk lid do not operate. Basically i'm missing the reference voltage from the BCM on the trunk release and the fuel door release buttons. The switches do supply good ground on the terminals to the BCM. Why would the BCM...	View
	1990 Chevrolet K1500 Cheyenne 5.7L vOLT GUAGE VIN: 1GCDK14K8L When the hazard/turn signals are on the volt guage, fluctuates wildly, bouncing from approx. 16v to 8v. The limited wiring diagrams in MOD are little help. I scopped the current and voltage on the circuit from the switch to the guage to the L terminal at the a...	View
	1991 Chevrolet Corsica LT 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, ONLY AT IDLE VIN: 1G1LT53TXM car came in dying out after 30 minutes of run time, ecm would get hot and kill injectors. changing ecm solved this problem however odor from cat and missfire prompted futher inspection and we found injector's regulator and converter bad. wires and plugs were a...	View
	1994 Chevrolet S10 4.3L Cuts out VIN: 1T34SDHYEY we knoe engine is running lean-when engine accelerates over 2500-3000rpm starts to sputter-02 reading drops to very lean and pulse width for injectors go up. long trim fuel goes up to 138-pcm trying to give it more fuel. fuel pump and strainer were changed, ck...	View
	1997 Chevrolet K1500 Cheyenne 4.3L Surge, Misfire VIN: 1GCEK19W8V G.M Techs, Have this vehicle that comes back with either, dist. cap & rotor carbon tracking or wires are arcing. Has A/C Delco parts put on the last 2 times. What are we over looking. Any suggestions would be apprecaited. Thanks Dean	View
	2000 Chevrolet Cavalier 2.2L abs VIN: 1G1JC1242Y Vehicle came in with Trac Off light on. Scan for codes got c1275 PCM requested ets off. Tried the fix archive nothing found . Alldata no listing for this code Thanks	View
	2000 Chevrolet Express 3500 5.7L radio/cellphone VIN: 1GC11G35RX vehicle came in,with bad radio static on AM/FM,also on the cell phone.The static increases and decreases with the engine acceleration/deceleration.disconnected the alternator to see if we were getting any back feet from the alternator, static situation stays t...	View
	1991 GMC Pickup K3500 6.2L Unknown Hello guys. We have a customer who is considering of buying this GMC imported from japan. He wants us to do a compression and leakdwon test prior to pruchasing. Our quistion is can somebody tell me what the compression pressures suit be for a vehicle with this...	View
	1992 GMC Safari SLE 4.3L vibration VIN: 1GKEL19W5N Customer recently purchased this vehicle and since then has complained of a poor idle and vibration at idle.When vehicle entered our shop it had been to several places and the owner was told condition normal.I found vibration to be excessive and started inspec...	View
	1993 GMC C3500 Sierra SLE 7.4L rear brakes VIN: 1GTHC33N7P When you apply the brakes in the truck, it nose dives and locks the front wheels with steady pressure. it feels like the rear wheels are not getting enough pressure. it has rear ABS and no front ABS. I think the Rear ABS unit might be restricting the flow of f...	View
	1996 Oldsmobile 88 Royale 3.8L Cooling Systems I have a good friend who is having a problem removing a water pump, he said he can not remove the last bolt because the power steering pully is in the way. Question can the pully be removed from the pump? Is there enough room to use a common gear puller and th...	View
	1998 Oldsmobile Intrigue GL 3.8L odometer VIN: 1G3WS52K3W Hi! We replaced battery 6 months ago & odometer reads kilometers (it used to be miles). How do we make it read miles again?? We've tried unhooking the battery. We tried reflashing the computer. Was told yesterday that this vehicle's odometer is calibrated thro...	View
	1996 Pontiac Grand Am GT 3.1L Poor Idle Quality, MIL Lamp on VIN: 1G2NW52M9T this one has got me baffled. aftrer replacing pcm and egr we stiil have the same problem. at idle, the egr valve is open 20%. the pcm is not commanding it open, and we ran it with the exhaust removed with same results.what could be causing the valve to open? w... Trouble codes: P1406 (egr pintle position circuit)	View
	1996 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5287T Hello everyone, The car came in with no complaints except CEL on. The only code is the PO341 cam sensor and since there's no cam sensor, I checked service bulletin's and came up with checking secondary ignition. The plugs were old with large gap, so I replace... Trouble codes: P0341	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1992 Buick Regal Custom 3.8L battery VIN: 2G4WB54L8N Thanks for your help, great information you can only find from experience. I called customer today, battery has not gone dead. It's been 4 weeks since I disconnected drivers door electric door lock switches. I guess there is a tsb on the problem. New door lock...	13
	2000 Buick LeSabre Limited 3.8L No Start, Cuts out, Stall, Misfire VIN: 1G4HR54K6Y Thanks to all who replied, sorry I took so long to close with fix, but I wanted to make sure the problem was completly solved. Customer has returned serveral different times saying there have been no further problems. Out of the 10 replies I received 4 were ...	10
	1996 Cadillac DeVille 4.6L instrument cluster VIN: 1G6KD52Y8Y The replies I recieved all pointed to the IPC. The parts for repairing these clusters are on backorder. tried a recycled unit but could not get the IPC to relearn the pass key resistance. I had a number of different suggestions on how long to leave the key on....	13
	1999 Chevrolet Blazer 4.3L Blend door VIN: 1GNDT13WW2 Thanks to the people who responded. They all pretty much said to check the actuator and to make sure the door wasnt binding. after many fustrating hours on trying to figure how it works, rechecking powers, grounds and connections, ohming wires I was back to th...	3
	2000 Chevrolet Suburban 1500 LT 5.3L Passlock VIN: 3GNFK16T6Y One hopeful respondant suggested trying to start the vehicle after the repair. He calculated a one-in-ten possibility the vehicle would start and run. Well, I should have bought a lottery ticket because the big ol' Chevy just fired right up! However, for the u...	12
	2002 Chevrolet Trailblazer LS 4.2L engine VIN: 1GNDS13S82 the motor mount at the back of the engine was bent & casusing the engine to have a severe rattle	7
	2002 Chevrolet Silverado 1500 HD LS 6.0L tccm VIN: 1GCGK13UX2 tried replacing tccm, no change in condition. rechecked wiring from tccm to encoder motor. all still checks ok. i feel that the encoder motor is probably the problem but didn't want to gamble with customers money without any way to verify it. customer is takin...	10
	2002 Chevrolet Silverado 1500 5.3L converter VIN: 1GCEC14T52 Took the valve body and the pump to the local trans shop upon his suggestion. He tells me that the front bushing in the pump is bad about wearing and keeping it from building enough pressure to properly apply the converter. He replaced the bushing and then wen...	10
	1990 Oldsmobile Toronado 3.8L Dash display/climate control VIN: 1G3EU13CXL Most replies I recieved suggested the IPC as the culprit but after sending the unit out for repair I still had the same problem. After the update post several suggested the CPS as a possible culprit but with testing the results are still inconclusive. I am con...	8
	1999 Oldsmobile Intrigue GLS 3.5L Security keyfob & Locks VIN: 1G3WX52H9X A big Thank You to all that helped out with information that helped us change the locks... we took out all the locks went to a local Lock Smith that changed the tumblers around and made new keys... Reprogramed the keyfobs all for under $100 thanks again... Our...	7
	1991 Pontiac Grand Prix LE 3.1L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, MIL Lamp on VIN: 1G2WH54T2M Tim from Wisconsin hit this one right on. I was too dumb to think this could happen. IAC valve was stuck wide open. Evidently, if ecm can't control high idle speed, it starts shutting fuel off.This caused severe lean at idle. Ihe tps voltage threshold .98 volt... Trouble codes: 31 (Map Sensor high), 44 (lean fuel).	9
	1998 Pontiac Bonneville SSE 3.8L low boost VIN: 1G2HZ5214W RECIEVED 5 REPLYS.THE GENERAL OPINION WAS THAT THE SUPERCHARGER WAS PROBABLY JUST WORN OUT AT 160K,EVEN THOUGH IT WAS NOT MAKING NOISE.DIAGNOSTIC HOT LINE FAXED ME TROUBLESHOOTING CHART THAT WE WENT THRU,AND ALL CHECKED OK.THE CUSTOMER STILL INSISTS IT IS NOT ...	6
	2002 Pontiac Grand Am SE1 2.2L timing chain VIN: 1G2NF52F42 Thanks again IATN techs, pulled valve cover found #1 cylinder valves bent also found timing chain broke. Installed salvage engine, tore down old motor found nothing wrong with tensioners motor was clean, I wonder if GM is going to recall this problem.	17

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