NEED HELP Engine Performance Issue

NelliM60

Original poster
Member
May 9, 2016
40
Atlantic City, New Jersey
Hey Guys
Been a while since I posted so a very belated happy new year to all the GMT fans!
My latest issue is my truck is over 165k miles and recently the engine is underperforming. Specifically when I am in the middle of driving especially on the highways the engine begins to make a low muffled sound and I can feel her revving at a low performance than normal. When I put the shift into D3, it picks right up but you know I shouldn't be driving at high speed for a long time in that position. I am looking to see if anyone has any ideas or what would be the first area to attack. She's not putting out any codes so I am very confused. I change the oil on time every 5k miles. Any help would be appreciated.
 

HARDTRAILZ

Moderator
Nov 18, 2011
49,665
Sounds more like trans than engine
 
  • Like
Reactions: Mooseman

HARDTRAILZ

Moderator
Nov 18, 2011
49,665
torque converter not locking?
 
  • Like
Reactions: Mooseman

Chickenhawk

Member
Dec 6, 2011
779
Also, cat could be plugged.

Where is the needle on your coolant temp gauge? Center, slightly left of center or slightly right of center, when warm?

BTW, you are wasting money on oil changes. Follow the oil light; you'll be fine.
 

Forum Statistics

Threads
23,273
Posts
637,498
Members
18,472
Latest member
MissCrutcher

Members Online

No members online now.