2005 GMC Sierra 2500HD
167,000 miles
auto transmission
the truck hesitates then stalls tested fuel pressure was good and spark plugs are new.
When it stalls it’s hard to start I’m very lost I am thinking fuel pump since no codes
which engine please?
6.0l
if fuel pressure is good then so is pump.
make sure air filter and intake is clean. Check for vacuum leaks. Have your electrical system tested.
Checked electrical system and battery was 633cca out of 800cca and alternator tested fine and starting systems fine I am gonna replace the throttle position sensor and see if it acts up.
Replaced tps and now it doesn’t even make it a mile down the road and dies.
I don't know why you're wasting your money by throwing random parts at the problem.
look for those vacuum leaks like I said. especially around the intake manifold
Try jump starting it & check if it starts. Also, check your MAF sensor.
Maf is new and the battery just needed a recharge
And when it stalls it stalls on the road
Assuming the MAF sensor is OEM & the battery + alternator checked out on a load test, I’d follow @mountainmanjoe ’s guidance. Also, what was your fuel pressure? It’s supposed to be 60psi +/-5
60 psi and maf is oem part