My GMC [Terrain](/topics-terrain/) has a rattling sound w...


My GMC [Terrain](/topics-terrain/) has a rattling sound when around 5-20 mph... or when idling.. any idea what would cause that? Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has t...

My GMC [Terrain](/topics-terrain/) has a rattling sound when around 5-20 mph... or when idling.. any idea what would cause that? Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on? It’s been a week and a half.. & it sounds like upper end motor. Not during idling though sorry typo. Mechanic's Assistant: What year is your Terrain? 2013 Mechanic's Assistant: Are you fixing your Terrain yourself? What have you tried so far? No I’m not.. I’m not sure where to start. Will injectors make that noise?

Automotive Expert
Hello, my name is \*\*\*\*\* \*\*\*\*\* I'm sorry your having problems with this vehicle so I'll try to help you with this issue.The website may prompt if you want a call, but that would be up to you. So it would be nice to know which [engine](/topics-engine-gmc/) you have
Automotive Expert
if it has the 2.4 engine it could be an issue with the timing chain, which fails at about 110000 miles. or it could be the high pressure fuel pump as well.

6 cylinderLet me ask one second6
Automotive Expert
Ok so they also have issues with the timing chain and also the rocker arms, can have problem there are bulletins on the rocker arms.
Automotive Expert
here is that bulletin, and it could be an issue with the timing chain.

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