What is the difference between a timing chain and timing belt, price difference to repair and which is better buy
Timing chain is made of metal and doesn't need to be replaced as a maintenance part. A timing belt is made of rubber and other composites, and that needs replacing on a regular basis, usually 90K. miles. I can't comment on which vehicle you listed as better. Depends on what you want and how each were maintained. Have your vehicle inspected by a mechanic before purchasing.
I believe both of those trucks have belts not chains
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