GM Automotive Technicians Technical Discussion and Fixes for Mar 31, 2005 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1987 Buick Electra Park Avenue 3.8L No Start VIN: 1G4CW5136H well i've got a good one here.customer drops off car and says it runs really rough and tells me he has been working on it for 2 weeks(right there I should of turned it away)but we took it in I open the the hood (after pushing it in) and the entire wiring harne...	View
	1990 Chevrolet K1500 Cheyenne 5.0L DRL High Beams VIN: 2GCDK14K3L This truck has no High Beams or DRL. When you start the truck, the DRL lamp, the high beam indicator and the Buzzer are all going. When you turn the headlamps on, they all go out or stop. When the high beams are switched on, the indicator comes on like it shou...	View
	1994 Chevrolet Camaro Z28 5.7L 2-3 shift VIN: 2G1FP22P3R Trans shifts ok during normal driving but hits rev limiter on 1-2 and 2-3 shift at wide open throttle. Worse on 2-3 shift. Will shift after partially letting off gas. No fault codes. Solenoids have been changed but did not help. Prom chip is GM and correct. No...	View
	1994 Chevrolet K1500 Suburban Silverado 5.7L ABS light on VIN: 1GNFK16K3R ABS light comes on intermediatly. Found codes 41 , 42 , 45 , 46 , 51 ,and 52 . Alldata describe these codes as control valve problems. I do not have a tech 1 or 2. Any help is greatly appreciated.	View
	1995 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1JC5246S cannot stop this car from missing and running bad very hc and co has constant miss the hotter the engine gets worse reading become some please help compression good everything seems to be working okay help me please	View
	1996 Chevrolet Cavalier 2.2L running replaced engine runs good at idle when accelerated it busts up and sets code for cam and crank sensor out of synk replaced both of them same problem replaced pigtail harnes to crank sensor same prob. replaced pcm,coil pack cked fuel all ok does this mean that ...	View
	1997 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G1ND52M9V I got this intermittant problem, gosh I hate saying that , nobody likes intermittants. Well, atleast I don't. this car suppose to be missing, cust. states it chugged and light flashed on him. upon driving over here the chugging gone,(go figure) but light still... Trouble codes: P0300	View
	2001 Chevrolet Blazer LS 4.3L Will not come out of 4WD VIN: 1GNDT13W31 Help !!! This Blazer came to me stuck in 4WD, I have had some experiance with these and thought it was probibly the typical bad dash switch or bad encoder motor or possibly a corroded TCCM connector, NO such luck... The dash switch will switch between 4WD and ...	View
	2002 Chevrolet Avalanche 1500 5.3L Engine VIN: 3GNEC13T13 Guys, This vehicle just shut down. The oil change light came on and the engine shut down. I am not getting any spark at the plug wires, the light that circles what gear is engaged does not come on. The engine turns over as normal. Is there anywhere I can exce...	View
	2004 Chevrolet Astro 4.3L RF interfere VIN: 1GNDM19X64 This is my personal vehicle. Installed my Ham Radio so I could enjoy operating High Frequency (1.8 to 54 MHz)operation while on vacation. Found I could not silence the electrical noise being generated by the Ignition or Injectors. Have ground strapped the hood...	View
	1997 GMC K2500 Sierra SL 6.5L miss fire VIN: 1GCGK29F0V I am writing for a fellow tech, ( I think I have to get him onto this). He resently bought this truck with a blown engine. Block was cracked between two cylinders. He got a junk yard engine. could not get fuel to injectors. replace inj pump with old one from t...	View
	1996 Oldsmobile 98 Regency Elite 3.8L shifting VIN: 1G3CX52K8T cust brought me vehical with a bad trans. replaced with a used one out of same year car wont up shift on its own you can manualy shift it fine. scaned vehical and results were tcc selonoid , 1 2 shift selonid shorted 23 shorted well i took the internal harnes ...	View
	1995 Pontiac Firebird 3.4L No Start, back fire VIN: 2G2FS22S7S This car was driven to us with no power. We found that the cat. was plugging the exhaust so bad it had burnt up the egr solenoid pack and the check valve. In or diag, we also found the famous a.i.r. elec. pump poped the fuse and the motor inside it was locked ...	View
	1996 Pontiac Bonneville SE 3.8L blend door VIN: 1G2HX52K2T We did the above work and hooked the battery up and the heater now starts blowing hot air and then goes to cool air and sets code 40- blend door problem. We watched this thing on a scanner and dial up full cold (100) and then watched atual values and the door ...	View
	1997 Pontiac Grand Prix SE 3.8L fan motot VIN: 1G2WJ52K2V problem was high speed only and motor noisy.Put in new motor and resistor. the motor is quite but still only high speed. If you disconnect the connection at the resistor and use a test light on it the light will light up on different leads when you change to d...	View
	1996 Saturn SC1 1.9L Cooling Systems VIN: 188ZF1288T Good morning. I have this Saturn here that has a substantial amount of engine oil in the coolant reservoir and the engine oil is not reading on the dipstick. Is there an issue with these 1.9L OHC engines? Are they prone to head gasket failures? Thanks in advan...	View
	1999 Saturn SC2 1.9L abs VIN: 1G8ZY1274X hI FINE TECHS: THERE IS A CLICKING NOISE EVERY TIME WE BRAKE AT OVER 18 MPH WHILE DRIVING. WE CANNOT DUPLICATE PROBLEM WITH VEHICLE ON LIFT. i GUESS IT'S BECAUSE REAR WHEELS DON'T SPIN ONLIFT. There are no codes present because ABS light does not turn on. My s...	View
	2001 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW52R51 Car setting codes for rich both banks. Fuel trims going to -32 both banks and will drive long term up to -11 at idle and have gotten it to get up to -12 cruise both banks. Car seams to run fine data in freeze frame had set with a total fuel trim correction for... Trouble codes: P0172 (Fuel trim sys. Rich B1), P0175 (Fuel trim sys. Rich B2)	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1996 Buick Skylark Custom 3.1L intake/bottomend VIN: 1G4NJ52M1T We have had 2 oil changes in the first ten min of running, we will change the oil again as the post suggested. Sounds like we will probably be okay with this one, Thanks Again Jon	22
	1991 Cadillac Brougham 5.7L Poor Idle Quality VIN: 1G6DW5478M Upon being hesitant I did another compressor job with another ac delco unit and problem solved!!!	4
	1990 Chevrolet Lumina 2.5L Excessive Emissions, Surge, MIL Lamp on VIN: 2G1WL54ROL Thank you to all fellow technican who gave me advice to fix this vehicle. It come down to a injector that was leaking. I had put a gasket kit & fp regualtor in before the injector. After the injector was put, my O2 voltage, block learn & intergrater reading ca... Trouble codes: 45 (rich exhaust).	14
	1994 Chevrolet C1500 Suburban Silverado 5.7L abs,ect VIN: 1GNEC16K9R I would like to thank everyone for their help.After just about replacing everything still not fixed and then i decided to turn the rotors and replace the brake pads although the rotors and pads were fairly new.Now ,no more pulling!! No matter how new a part is...	21
	1995 Chevrolet Blazer 4.3L Poor Idle Quality, Surge, Stall VIN: 1GNDT13W5S We has lots of great input about this problem. We found the letting top engine cleaner soak in overnight helped a bunch. When the injector failed we should have insisted on a motorvac but the customer wouldn't go for it. We also found good info in GM bulletin ... Trouble codes: P0141, P0300, P1406, P1133, P0441, P1122.	6
	1999 Chevrolet C1500 Suburban 5.7L shifting VIN: 1GNEC16R6X This vehicle is fixed as far as can tell 5 days on road. We installed a bluementhal transmission which came with a external cooler. Also noticed the connector on the valve body seemed to not snap on tight you could shake it and it would work loose. We glued it...	7
	1999 Chevrolet Silverado 1500 5.3L Steering VIN: 2GCEK19T5X Well we got the noise out of this colum , we had to remove steer coloum and replase lower bearing and lower shaft. thank you all very much and have a good day.	7
	2001 Chevrolet Silverado 1500 5.3L front susp VIN: 2GCEK19T11 I appreciat the 8 replies and they were all very good and I checked all those items. I would especially like to thank mr. [...] for his low tech suggestion I was able to track the noise to the pump with rubber hose where noise finders were unsuccessful. I appre...	8
	2001 Chevrolet Monte Carlo LS 3.4L keyless entry VIN: 2G1WW12E81 problem ended up being my tech 2,after talking with several people with the tech 2 technical support they belived it was in the tech 2,I reprogramed the BCM using another tech 2 borrowed from another shop,fixed everything I was still able to reprogram the repl...	9
	2000 GMC Sierra 1500 SL 5.3L Air bag VIN: 2GTEC19T8Y I received 6 replies stating that the release procedure was the same as in 1997. Two people said it was not necessary to remove the steering wheel to get the covers off. Armed with that information I decided that the old concept of KISS was the best. I was abl...	6
	1996 Oldsmobile Achieva SC 2.4L Poor Idle Quality, Surge VIN: 1G3NL12T1T Well all of you who told us to ck cam timming 'BINGO' you were all correct, thanks so much. The exhaust cam was off one tooth. We had an idea of this yesterday when the vacume gauge was jumping around pretty wildly, but just did'nt want to pull that cover. wel...	8
	1994 Saturn SL2 1.9L shifting VIN: 1G8ZK5574R Thank you! Thank you! Thank you! I don't know if we would have figured this out without your help, had a lot of responses for a wrong trans. sohc cam engine trans has a different ratio from a dohc engine trans and can be identified by casting #'s on the bell h...	14

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