2003 GMC Sierra 1500 HD Q&A
2003 GMC Sierra 1500 HD Question: how to fix if Engine has a ticking noise.
While engine is running there is a ticking noise comming from the lifter. - Visitor
Next oil change try using Mobil 1 synthetic because the same thing happened in my sons Trans Am we were using Valvoline 10w-40 and we had one lifter sticking then we switched to Mobil1 10W-30 and that solved it www.mobil1.com and its available at Walmart in 5 quart jugs - hemicuda
If you have upgraded this vehicle then you might need to run a higher octane fuel to solve the problem - Visitor