Truck dies, will restart but not stay running in drive. Will run in reverse.
1999 GMC Sierra 1500. Running great,
dies after about 50 minutes to an hour.
Will restart but not run in drive. Will run in
reverse. Started this about a year ago.
Have replaced Maff sensor, crank sensor,
something in distributer, ignition module,
and some sensor in the transmission that
controls torque converter. Still dies, still
won't restart and run for hours or
overnight. Fuel pump pressure and pump
was fine. Please, any ideas?????
Time to check the "GM" ECU computer. based on age and symptoms. So you have no DTCS? really time to inspect the computer!