Could my drive shaft bearing be the culprit?
My 2006 GMC envoy (114,000 miles and serviced on schedule)makes a sound, on
occasion, from underneath the truck while driving. It sounds like grinding/humming or
some type of winding sound. It seemed to be trying to shift gear. I suspected the
transmission. It checked out to be shifting good but had it serviced by the dealer
anyway. The shop suspected that the noise was from a front wheel hub bearing
assembly. Both were repaired. I heard the grinding sound 2 days later. Did some
searches and thought maybe the differentials needed servicing. Both were serviced.
After leaving the shop, I heard the sound again. The transfer case was not serviced. It
was said to be low but, no track 3 oil in stock. I will get it done within a day. it always
happens during acceleration. Previously, I thought it only made the noise when the AC
was on. That proved to be wrong. I achieved 45 mph heard the sound, took my foot off
the accelerator and the noise faded away. I hope this is a more helpful post. thanks!
Did anyone suggest a bad universal joint on the drive shaft?
no one suggested the universal joint. I've had my truck for 8 years. I've made all scheduled services. I assumed my Pals at GM would find/fix this with no problem. Finding out that things are more challenging without trouble codes. I will have this checked. Thanks Reelin68!
Hello Martee, Have you been able to uncover the mystery? was it the universal joint? Im having the same exact problem. Thanks for sharing,
Looking for a Used Envoy in your area?
CarGurus has 2,044 nationwide Envoy listings starting at $1,500.
Search GMC Envoy Questions
GMC Envoy Experts