Forum Discussion
greatwhitenort1
Jul 20, 2015Explorer
I bought an 05 LLY new, & only put 72,000 miles on it in the 10 years I owned it. Was an awesome truck, pulled my 14,000 lb 5th wheel effortlessly. Only put front wheel bearings, shocks, & regular maintenance in it.
That being said, GM had issues with crimped headgaskets on the LLY engines that is not a matter of if they will go, it's a matter of when. They redesigned them when the came out with the LBZ engine in 06. With 122,000 miles on the truck your looking at it may or may not have had the headgaskets done. It is a very expensive job if you can't do it yourself, $5000+ dollars if you go with ARP studs instead of regular head bolts, which I would recommend.
The transfer case on all the classic body trucks from 01 to 07.5 had an issue called pump rub where a clip on the pump will wear thru the transfer case, and if you don't catch it before it happens you will lose all the oil & will need a new case. There are numerous places that sell a kit to replace the faulty GM parts to eliminate this from happening.
The over heating issue happens to all the LLY trucks if you pull heavy up grades in hot climates, if your not in a hot climate, or don't pull you may never see this, mine never overheated once, but I don't live in a hot climate. It was another engineering issue that was mostly improved on the LBZ.
That being said, GM had issues with crimped headgaskets on the LLY engines that is not a matter of if they will go, it's a matter of when. They redesigned them when the came out with the LBZ engine in 06. With 122,000 miles on the truck your looking at it may or may not have had the headgaskets done. It is a very expensive job if you can't do it yourself, $5000+ dollars if you go with ARP studs instead of regular head bolts, which I would recommend.
The transfer case on all the classic body trucks from 01 to 07.5 had an issue called pump rub where a clip on the pump will wear thru the transfer case, and if you don't catch it before it happens you will lose all the oil & will need a new case. There are numerous places that sell a kit to replace the faulty GM parts to eliminate this from happening.
The over heating issue happens to all the LLY trucks if you pull heavy up grades in hot climates, if your not in a hot climate, or don't pull you may never see this, mine never overheated once, but I don't live in a hot climate. It was another engineering issue that was mostly improved on the LBZ.
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