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Q: When should timing chain be replaced? What is the avg. cost of parts & labor? on 1999 Chevrolet S10

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Was having problems with lack of power on acceleration when truck died in traffic and would not start. No noises, vibrations, etc before it died. Am told that two ignition coils were bad and timing chain broke. Truck has 99,980 miles. Could not find any maintenance recommended for S-10s or milage life expectancy for the timing chains.
(1) Answer
the norm is 150k. on your truck, the timing chain guide is common for failing causing the chain to fail.

it is around a 500-600 repair.

Roy