dkmoneypit

Update: Sloved but not exactly sure where the actual problem was. I did a few things prior to the fix. Purchased a AC Delco MAF sensor. Still no change. When hooked up to the Autel the MAF grams were bouncing all over anywhere from 1 to 23 grams and engine would hardly run just like before. Major disappointment. Unplugged the MAF while running and the engine smoothed out. Checked and made sure the connector had solid engagement when plugged back in. Made sure there were no loose wires in the MAF connector. Back probed the MAF wiring harness again and verified the correct voltage with the engine off and running. Had to be something with the signal from the MAF to the computer. Check as much of the wiring as I could. Pulled and checked a few fuses that should have been related to the MAF or computer. Noticed the legs on 2 of the fuses looked like they might have been worn a bit. Never had them out before. Turned them 180 degrees and reinstalled. Was trying to get everything working prior to my registration expiring but that didnt happen so I had to do a Non-Op on the old girl. Went out the next day checking wires and tring to find the ground wires. Started it and she was running smooth. Not sure if it was something in the wiring that I maybe moved or if it was those fuses that looked worn. Been running good for 5 days with no codes. Even got the monitors to all reset - except the evap monitor. Dont need that one to pass a stupid smog check. Come on Lee Zelden. Get rid of these smog checks! Hope this helps someone.

I used the same Delphi that the local shop put in it 2.5yrs ago when it was having similar issues. Actually, they put 2 in it. Back then they changed the MAF, fuel pump and intake gaskets. I'll have to look up what the original equipment was and try one. It hasn't run right since I originally took it in. Definietly cant depend on it. Thanks for the info. Will have to try after the new year. Too much going on during the Holidays. I appreciate all the input. My problem is with the MAF somehow. The readings on the scan tool dont lie. Thanks again.

I read on a different thread that there is a 175amp fuse on the fire wall close to the battery that will go bad.

Getting both codes. Put in new Delphi MAF from Napa, disconnected the battery to reset the ECU for the new MAF, new air cleaner filter, hooked up smoke machine - no vacuum leaks. Fuel pressure a little low - changed fuel pump. Still throwing codes. Hooked up Autel 808 scanner, MAF readings not holding steady, grams bouncing all over while idling. Put in a cheaper MAF from Amazon - no change. Installed another Delphi MAF from Summit this time - no change. Unplug MAF and engine smooths out. Checked all the MAF wires and cant find any problems, back probed MAF and got 12v going in and 2.7v from the signal wires. Started again today with rough idle, unplugged MAF for a minute and the engine smooths out, then plugged the MAF back in, engine still running smooth. Took it for a 12 mile drive and was running great and 1 of the monitors even reset. Let everything cool off for a few hours and decided to take it for a drive to get another drive cycle done. Running like garbage again. It's got 151k on the clock but would like to drive it to work to keep the miles off my truck. I live in CA and need to smog it by the end of this month but I dont see that happening. Any other ideas?

Did this a few years back during the winter. I noticed the mpg went down. If I remember correctly it was down about 1 to 1.5 mpg.

Thank You

Does anyone know if the H3 Hummer rubber motor mount 25847739 will replace the OEM fluid filled mount for my 09 Yukon?

I think I'll wait for a few more lights to go out before I replace the whole unit. Looks pretty straight forward. Thanks You

I'm having the same issue with my 2018 1500 Silverado. The rear defrost button was blinking on and off now it wont light up anymore. Now the upper and lower vent switch ( the one that you have on in your pic ) light is blinking on and off. I assume its just a matter of time before that light goes out also. Mechanically everything works. Just the button lights are starting to go out.