GM GMG-430 — Coolant Cont.
For the GM GMG-430.
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Procedure
- 4. Continue to idle the engine for about 30 minutes.
- 5. After stopping the engine, open the drain cocks of the engine crankcase and radiator to drain
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.