I bought a 2001 c2500 h/d truck from bill heard chevrolet in novermber 2000. After the first oil change, i noticed every time we started the truck it would knock for about a minute. I took the truck to the service department at bill heard and they just said its a design flaw but would not hurt anything. I took the truck back a short time later and had them keep it overnight so they could start it the next morning and hear the knocking, when i went to pick up the truck i was told its normal because its the h/d and it takes longer for the oil to get to the engine and it didnt pass the 2 minute test, so they would not investigate any further.
I took it to another chevrolet dealership close by and they said the knocking was caused by an oil filter (fram). Not a gm product. I had them change the oil themselves and it still knocked. They said it was a design flaw also and could not be fixed. I researched this on the internet and found they had the same problem in 1999 and had to fix the problems. I'm wondering it my 2001 has got a 1999 engine?
I did contact gm/chevrolet and they gave me, after some discussions, a written engine warranty for 100,000 miles. Of course this design flaw was never mentioned when we were buying the vehicle and the chevy dealerships all agreed it is a design flaw. I consider it bad advertising when someone asks me if my truck is a diesel (because it knocks) i just give them my story and refer them to ford. My next vehicle will be a ford.
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