Please Help Meeeeeee

EvilleDoug · October 14, 2008

Hello everyone, my name is Doug, I live in Evansville, IN and I was recently able to buy myself a newer truck. I’m a disabled Veteran and after fighting with the VA for two years I received a back pay lump sum and was able to use that money as a down payment for a 2001 GMC Sierra 1500 SLT 5.3L 4X4. It is the Canadian made model, 2 being the first number in the VIN.

I work part time because of my disabilities and can not afford to take my truck to the dealer to have them tell me something minor that I can fix here.

The problem started with a code Po171 and Po173 for lean O2 sensor readings. I tried to contact the previous owner to ask him about his maintenance on the truck, but could not get a hold of him. So, I changed all 4 O2 sensors. The reading was still there and it was suggested that the MAF sensor might be bad, so I replaced that too. I replaced the Evap solenoid valve on top of the intake and the fuel filter. Now I’m getting a code Po300, misfire multiple cylinders. I checked all of the plug wires, their all tight. I pulled 4 random plugs, checked the gaps and checked to see how they looked. Everything was fine. I have checked all of the fuses, even the ones for the interior lights, All good! I used a multi meter with the key on and off and there was nothing that popped a red flag.

The 171 and 173 codes are now gone.

After replacing the Evap solenoid the truck ran fine for about 50 miles(the battery was unplugger for about 30 minutes, I gave it extra time to clear the codes) then SES light came back on and that’s when I got the 300 code.

I am at my wits end trying to figure out what to do next, other than taking it into the dealer and be charged money I do not have to spare.

If anyone reads this and has any suggestions, please reply.

DofD · October 14, 2008

Hi there and welcome to GM Trucks there Doug!

I am really sorry that you're having so many problems with you truck. I don't have any suggestions, as it's out of my realm of experience, but there are certainly folks here that should be able to lend a hand.

I would suggest posting your questions in the general full size forum just in case not every one takes a look in this forum.

EvilleDoug · October 14, 2008

Hi there and welcome to GM Trucks there Doug!

I am really sorry that you're having so many problems with you truck. I don't have any suggestions, as it's out of my realm of experience, but there are certainly folks here that should be able to lend a hand.

I would suggest posting your questions in the general full size forum just in case not every one takes a look in this forum.

Thanks for the tip. I will post it there.

Doug, and thanks for the welcome aboard!!

ZZ327 · October 14, 2008

you dont have to go to a dealer, Just find yourself a good repair shop.

mbrannon · October 17, 2008

Welcome to this site and THANK YOU FOR YOUR SERVICE! I'm an expert in BS and probably not your best source for help with your truck... Hope and pray everything works out for you.