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2003 5.3 P0300 Assistance

jwh463

By jwh463
in Ask A GM Technician

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Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Can thank GM for that - miles of wiring, multiple intake manifolds, no room to work - takes you couple hours just to get in there. Replacing it is the easy part.

 

If you bought that used maybe the previous owner never changed the oil. If it's been taken care of, then chalk another faulty part out to GM trying to save a buck. Same reason we have Youtube videos of trucks with 500 miles smoking out their garages.

00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

Can thank GM for that - miles of wiring, multiple intake manifolds, no room to work - takes you couple hours just to get in there. Replacing it is the easy part.

 

If you bought that used maybe the previous owner never changed the oil. If it's been taken care of, then chalk another faulty part out to GM trying to save a buck. Same reason we have Youtube videos of trucks with 500 miles smoking out their garages.

 

 

Tell us how you really feel... :)

 

Actually I did watch some videos last night of people using carbon cleaners on their vehicles. They weren't all GM products and not all the people using the stuff were Einsteins either. Find the one where he thinks he is pouring the cleaner into his brake booster line.

jwh463 Enthusiast

jwh463

Posted
  • Author
Posted

...and why did the lobes wear??? There are sooo many members here that have easily hundreds of thousands of miles on their trucks without seeing that problem. Also new valves and a camshaft replacment cost MORE than a USED engine replacement? I must be out of touch with the cost factor of these trucks/engines....

 

I asked the same question about the cam considering I only had 103K miles. This is our FIFTH GM vehicle with the 5.3 and our first one requiring this much engine work. I guess I just got a bad one...babied it and nothing but Mobil One every used in it. Our 2005 Envoy XL also has the 5.3l and we recently gave it to our son with 125K and he has had no problems.

 

Repair vs replace; It was explained to me these motor are a dime a dozen. For instance they found a 5.3 with 56K miles locally for $900. The shop replacing it will warranty it for a year.

00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

I'd hope you'd get some kind of warranty. I guess that's why I'd rather be the small engine (relatively speaking) mechanic that I am. Repairs of this nature tend to be easier since the engine are lot easier to remove and work on. The biggest we have is a V6 Detroit diesel that you can remove in 2 hours or less, if you need to.

jwh463 Enthusiast

jwh463

Posted
  • Author
Posted

I'd hope you'd get some kind of warranty. I guess that's why I'd rather be the small engine (relatively speaking) mechanic that I am. Repairs of this nature tend to be easier since the engine are lot easier to remove and work on. The biggest we have is a V6 Detroit diesel that you can remove in 2 hours or less, if you need to.

 

shop just called, $2400 out the door (including labor incurred this week) the 5.3l was in a 2004 with only 42k miles. The money kills me but I am relieved this will take care of all the problems I was having
00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

So $900 for the engine and $1500 in labor/misc parts. Dang, that does hurt. Did you get an estimate on just repairing the current engine? Just a curiousity question since either way you should be getting a warrantied repair IMHO.

jwh463 Enthusiast

jwh463

Posted
  • Author
Posted

So $900 for the engine and $1500 in labor/misc parts. Dang, that does hurt. Did you get an estimate on just repairing the current engine? Just a curiousity question since either way you should be getting a warrantied repair IMHO.

 

$1600-1800 for the repair...most of that was in labor. I view the newer motor as piece of mind.....I was so close to filling it with 20W50 and trading it in for a Mini Cooper..decided I like only making motorcycle payments. My wife has 2011 Sierra Crew so I don't really need another truck but I dont want another payment either
jwh463 Enthusiast

jwh463

Posted
  • Author
Posted

Picked up the truck today, parted with $2459. Nice quite smooth idle with no tic tic sounds. Donor motor came from a rolled 2004 with 41k miles. Mechanic is going to try and do an autopsy on the old motor before they send it back to the vendor, I asked for some pics

00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

Good to hear so far. Please make sure to post of the pics, hopefully they find "the" problem. The more I thought about the more I'm thinking it sounds like a loss of lubrication led to the cam lobe wear. Just a thought though.

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