Car knocks while in park and as I am driving?

Tiny
JC1997
  • MEMBER
  • 2015 GMC TERRAIN
  • 166,000 MILES
When I start my car, it knocks while in park and as I’m driving. When I go up hills I have to really push on the gas. I’m thinking the compressor is messing with something else in the vehicle.
Sunday, April 20th, 2025 AT 10:42 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
That is easy enough to find out what the problem is, please turn off the HVAC system and take it for a drive to see if the problem goes away. Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.
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Monday, April 21st, 2025 AT 11:07 AM

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