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I have a couple of probems. One is the radio sometimes is dead and will not turn on. When this happens the turn signals seen to work but you cannot hear the normal clicking of the turn signal as it is blinking.

The 2nd issue is a ticking noise in the engine. Sounds like a lifter but also sounds like it is in the lower part of the engine. It also is intermittent, I only notice it at idle. Sometimes it is quite and just fine.

Vehicle: 2007 Chevrolet Suburban 5.3 engine

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The ticking noise there is a TSB about lifter being aerated which comes from low oil or the wrong viscosity.where the lifter are unable to purge air quickly.TSB 10-06-01-007D. What also causes lifter noise can be from internal oil leak at the main bearing and starves a particular cylinder lifter for oil.For this condition to occur the engine has to be at idle for at least 10 minutes and a loss of oil pressure would be noted. For the radio to work when intermittently and the turn to work intermittently inspect for this ground condition

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