This bulletin applies to 2014-2020 Chevy Suburban vehicles equipped with a 5.3L engine. A condition of crank/no start with diagnostic trouble code (DTC) P0011 and/or P00C6 stored current or in the history might be present. The engine may sound like it is cranking fast and the actual fuel rail pressure may be low.

A compression test may show lower than expected readings and exhaust flow from the tailpipe may be noticeably lower while cranking as compared to a known good vehicle. The fuel rail pressure sensor may show 300-400 PSI and will slowly drop down into the 50 PSI range while cranking.

The camshaft position actuator solenoid valve may be sticking or binding, causing the valve timing to be retarded.

Use the GDS to actuate the cam phaser solenoid 4 to 5 times, then try starting the engine.

Disable the ignition and remove the KR75 engine controls ignition relay located in the underhood fuse block in position 70, according to the fuse block lid map.

Also, disable the fuel by removing the fuel pump relay in position 59. Unplug the camshaft actuator. Install a 20A fused jumper wire between terminals 2 and 12V. Tickle/tap the low reference terminal 1 to ground by using the correct test terminal from the kit J-35616-65B on the cam actuator magnet while cranking the engine. Then try to start the engine. This may need to be performed more than once.