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PCM? These don't have a "PCM". Powertrain Control Module. They have an ECM (Engine Control Module) and TCM (Transmission Control Module). Do you mean update the radio? -
By GMCustomerService · Posted
We appreciate you bringing your concerns with your Silverado to our attention. As safety is our top priority, please fill out the form at https://s.chevy.com/support-request with all pertinent details to ensure your concerns are routed properly and we can assist further. -
Engine failure requires radiator replacement per GM if it contains an engine oil cooler. They do NOT want them flushed. Radiator replacement is also required for the 6.2 recall if the engine fails. Here is the TSB the dealer is referring to - 22-NA-074 1..2 Its a slightly older version, but the current version of it covers all model years 2000-2026. So if enough failure debris was present, it gets an oil cooler. If that is part of the radiator, it gets a radiator. Also, same for oil cooler lines. Those get replaced. Now something like a 2.7 Turbo which uses an oil to water heat exchanger for the oil cooler, the radiator would be left alone but the oil cooler would be replaced, as well as any lines.
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Doing the right thing, replacing both valves is the way to go. The valves with the ball leak far more often than the schrader. Never cared for them. The accumulator really should be replaced if the system has had no pressure in it and it was a keeper, but since you're looking to sell it, bet you can get by. Did you pull the orifice screen and see what was there? Shame you can't get 134a. Hopefully the previous repairs included dye. Some of the R4s I messed with developed leaks where the line sets connected or the front seal. Had one where the HPCO was leaking. Front seal would only leak under pressure. See any obvious oily spots? I've got nitrogen I use to test pressure and to help dry the system prior to evacuation. Keep up the good work -
By richard wysong · Posted
Next time you're on a road trip to a state where you can still buy it stock up on 12oz cans, you might look into getting certified so you can buy it where you are as well. When they switched from R12 to R134a the test for certification was easy, they basically just wanted the $25
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