How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Gary Your Own Question
Gary
Gary, GM Technician
Category: GMC
Satisfied Customers: 739
Experience:  Senior Technician
84449473
Type Your GMC Question Here...
Gary is online now
A new question is answered every 9 seconds

I have a 2006 GMC Envoy, straight 6 engine , that has 179000

Customer Question

I have a 2006 GMC Envoy, straight 6 engine , that has 179000 mile on it with no trouble until now. A little while ago I started hearing a little taping noise in the engine. I thought it sounded like a valve lifter leaking down. The oil pressure was perfect and still is now. I changed the oil and put 1 qt. of Lucas oil in with it and after about 10 miles it stopped. Several days latter it started again. Then latter stopped again Now it has started back and has gotten a little louder. This time its continues. I still say its acts like a valve lifter leaking down if that's the way these new engines work. Anyone had the same problem and know for sure what the problem is?
Submitted: 1 year ago.
Category: GMC
Expert:  Gary replied 1 year ago.
Hi, I would change the oil and add a bottle of "lifter free" made by Nulon.
Have had good success with this product.
Gary.

Related GMC Questions