- Aug 14, 2012
- 21
07 Envoy 5.3, 222k miles. Towing boat home other day and starting to hear loud noise, thought it was a wheel bearing but its coming from the engine. No codes and oil looked normal on the stick. I pulled the serp belt and started it thinking (hoping) it was a bad bearing but the noise actually was louder with no belt. Intensity varies but it seems loudest when first starting. Any suggestions are appreciated.