Skip the auto shop - Our mechanics make house calls

Q: Lifters knocking on a 2007 GCM Sierra

asked by on

I have a 2007 GMC Sierra with 5.3 liter. It has a 153,000 miles on it and every once in a while, I start hearing one of the lifters start knocking. I've changed my oil regularly with 5 quarts of GTX and 1 quart of Lucas oil stabilizer. What should I do?

A: If it doesn’t happen all that often, and it...

If it doesn’t happen all that often, and it doesn’t happen on high speed, but is just idling--I’d live with that if I were you. Because with that kind of miles on it, all those lifters are going to be worn. And, if you are going to replace one lifter, you are going to need to replace them all. That is a very expensive job.

I would keep doing what you are doing and see what happens. If it does get loud, eventually, you are going to replace them all. When I was a kid, I used to get them and I changed a couple. Months later, other ones are making noise. It drove me nuts and I used to take them all out and replace them all eventually. Do that right if you are going to replace them.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why is my transmission slipping?

The transmission in your truck has the updated 4L60 series with a heavier duty forward gears and thrust bearings so your transmission problem is most likely the torque converter or front pump failure. The clutch materials in an automatic transmission...

Q: I have a 3.6L leo commodore. I'm getting an error code of p0040. I need to swap the sensors plugs. Is it easy to find the connections?

Hi there. The code p0040 is for an O2 sensor connectors are being swapped. Make sure the O2 sensor connectors aren’t swapped. This can happen when work has been previously performed. Also, check for unplugged or damaged connectors, as well...

Q: Belts came off

Your vehicle uses two serpentine belts: one for the accessories and one for the A/C. I have known the A/C belt tensioners to fail on these vehicles, causing damage to the belt. There is also a technical service bulletin (TSB)...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...