GM Automotive Technicians Technical Discussion and Fixes for Apr 27, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1991 Buick Park Avenue 3.8L low battery VIN: 1G4CW53L4M the problem with this car is that the battery will go dead if not used for two days or less. checked for shorts and residual amp draw, but found nothing that might cause it. the car was in another shop for about two weeks and that is where the parts were put i...	View
	1992 Buick Century Special 3.3L rocker arms VIN: 1G4AG54NXN GM does not stock these rocker arms anymore. I have checked with Fed. Mogul, Sealed Power, NAPA. According to GM's parts locator there are only 3 rocker arms in the USA. Anyone have a solution, as otherwise the engine is fine even with the mileage. The owner c...	View
	1994 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: 1G4HP52L3R replaced t.p. sensor feb. 2004 due to bad hesitation and code. since then customer has done a fuel pump, m.a.f. sensor and o2 sensor. returned to our shop april 2004 with 2 lean codes stored and o2 sensor stuck at 4 with no cross counts. found resticted fuel f... Trouble codes: 131 (o2 lean), 171 (fuel trim lean)	View
	2001 Buick Century Custom 3.1L valvetrain VIN: 2G4WS52J61 Hello everyone. I have this 2002 Buick Century my father purchased from a used car dealer a few months ago. It has developed a ticking noise that appears to be coming from the top end. It sounded a little like piston noise so I shorted each cylinder out but wi...	View
	1990 Cadillac DeVille 4.5L Excessive Emissions VIN: 1G6CD1337L This vehicle runs well, passes all except nox, have been to test facility 3 times, same result no matter what we've done, don't have 5 gas only 4 gas so cannot verify cat nox. Trouble codes: 49 (thermactor air problem)	View
	2003 Cadillac CTS 3.2L timing belt VIN: 1G6DM57N23 Vehicle had flood damage to engine. replacement engine was required and engine supplied by customer came from a total burn out. Helper removed the front of the old engine and I am almost ready to re-install but I do not have a diagram for the timing belt for t...	View
	1979 Chevrolet Corvette 5.7L courtesy lights VIN: 1Z8789S441 I've determined that the lights wont go out as a result of a defective courtesy light delay module I can't however find the module. Anyone with a locator on this old dog I'd appreciate the info. Thanks in advance Kevin	View
	1990 Chevrolet C3500 Cheyenne 7.4L Door locks VIN: 2GCHC39N7L I was driving down the road and the door locks started locking randomly. No unlock, just lock. I retired, and no longer have access to a good wiring diagram. The Chilton book I got at the parts house is ok, but does not show the door lock wiring. Could someone...	View
	1992 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 1GCCK14KXN i hope every body is having a good day. i have this p/u that sets a code 43 on light or heavy accel. you will hear the engine start pinging and it pops the code. we ck'ed the wireing and replaced the esc module with no change. in the fix data base it says that... Trouble codes: 43 (esc module or circuit problem)	View
	1992 Chevrolet Cavalier RS 2.2L Poor Idle Quality, Hesitation, Stall VIN: 1G1JC144XN Hi to all. This rig is driving me nuts. I have checked the spark plug gap, was wrong. It has no codes, but runs poorly sometimes and dies sometimes. I have checked the map and tps sensors, both test fine. Was able at one point to improve the engine idle by hol...	View
	2000 Chevrolet Tracker 2.0L starter VIN: 2CNBJ13C6Y Vehicle came in with a broken cam chain tensioner, teeth missing on cam gears, and a leaking rear main seal. I R+Rd the engine to get the debris out of the oil pan, repaired the engine, put it back in the vehicle, and now I have a starter engagement problem. R...	View
	2000 Chevrolet Silverado 1500 5.3L Fuel Gauge VIN: 2GCEK19TOY Hello All I have this Chevy Pickup Silverado-1500 LS that the fuel gauge read empty and fuel light is on, sometime it will work.. With Snap On Modis i get code PO143, Fuel level, snsr, CKT signal High/Open I believe that its the fuel sending unit bit i like t...	View
	1992 Geo Storm 1.6L No Start, runs poorly VIN: J81RF2364N Hello every one need some direction on thsi storm. I have reset valve timing and corrected wire placement on this vehicle, yet it still starts and runs as if it was way out of time. I have very little vacuum at idle and compression is as follows 130 115 130 13...	View
	1996 Oldsmobile Aurora 4.0L head lamps VIN: 1G3GR62CXT This car has an issue with the headlamps and the taillamps coming on when it is parked and the key is out of the ignition and draining the battery. We have seen it a couple of times but have not been able to test anything. This usualy happens over night and th...	View
	1993 Pontiac Grand Am SE 2.3L engine VIN: 1G2NE5439N after replacing the cylinder with a new one we are seeing oil preassure drop to 0 at oil sender. we then check oil preassure at oil passage by tensioner and see 40psi. thought we may have a bad head so removed head didn't see anything wrong but replaced check ...	View
	1995 Pontiac Grand Am SE 2.3L Temp Gauge VIN: 1G2NE55D65 Hi Everyone. This on is a big head scratcher. The car came in running hot all the time. Found a plugged radiator with stop leak. Replaced the radiator and thermostat and drove the vehicle. Found it to run hot only when it was moving.35 mph and higher. Thought...	View
	2001 Pontiac Grand Am GT 3.4L Hesitation, Surge, MIL Lamp on VIN: 1G2NV52E61 This vehicle hesitates and mil lamp is on at times. Code indicated egr solenoid performance problem. I dont see that it has an egr solenoid, nor does the Mitchell component locator. We replaced egr valve (digital I believe with no vacuum hoses)and cleaned out ...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1998 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52MOW I really appreciate all the help with my question, i did not understand the code apparently. The problem was the injector on the #4 cyl. and the fact that i had a bit to learn. Trouble codes: P0304, P0300.	17
	2000 Chevrolet Silverado 1500 4.8L abs module VIN: 1G6EK14T8Y Just got the truck back Monday, and checked all the sensors at the wheels found them rusted like everyone said, but also found a lot of rust and caked up mud on the reluctors. cleaned everything and it solved the problem. thanks to all the people that responde...	19
	1998 GMC K1500 Suburban 5.7L MIL Lamp on VIN: 1GKFK16R1W well guys we got it fixed ,it wound up being dirty injectors , i did a cleaning with two can jut to make sure and the pressure held after that , before i cleaned them , pressure went from 55 psi shut down engin and in 5 min went to 45 and in 20 min went to 37 ... Trouble codes: 1072 (fuel trim system rich bank 1), 1075 (fuel trim system rich bank 2).	7
	2001 Pontiac Firebird Formula 5.7L MIL Lamp on VIN: 2G2FV22G71 Thanks for the replies, we just assumed this would be more difficult than it really was! soory for taking up good time but it was blockage through one of the air valve. We decided to replace both since parts were cheap and easy to install. Thanks again . Trouble codes: P1415 (Air System Fault Bank 1), P1637 (Generator L Terminal Circuit).	5

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