What do I do for a 2003 4X4 Chevrolet Avalanche 1500 shows a DTC p300
WOLFROM
MEMBER
2003 CHEVROLET AVALANCHE
185,000 MILES
I need to fix this it shows the check engine light when I go over railroad tracks and at times when I idle.
Tuesday, December 13th, 2011 AT 5:50 AM
1 Reply
RIVERMIKERAT
MECHANIC
6,110 POSTS
Engine misfire detected. Check the plugs. Make sure they're properly installed. Make sure the plug wires are properly connected. Check the connectors and grounds for the coil(s).