2001 GMC Yukon XL 1500 Q&A
2001 GMC Yukon XL 1500 Question: How do I sto p the engine from cutting back or skipping?
It sounds like you have an engine misfire under load. With the check engine light on a fault code is stored in the power train control module. Reading the codes stored in the pcm should help get to the cause of your misfire. - Russ