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Home›Repair guides›1. Open the radiator cap and open the drain cocks of the engine crankcase and radiator to

GM GMG-430 — 1. Open the radiator cap and open the drain cocks of the engine crankcase and radiator to

For the GM GMG-430.

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Procedure

  1. 2. Close the drain cocks and pour coolant into radiator. Run the engine until the coolant is heated
  2. 3. Ifthere is considerable scale or rust, pour in a cleaning solution and run the engine until the

Source: manual:GM_KEM_4.30L_Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.