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.
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.