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error code helplock7man 02-03-2005, 06:26 PM error code 12 ? error code 32 ? 1994 gmc jimmy 4.3L vortec rlith 02-03-2005, 07:45 PM 12 Means self diagnostic ok, 32= egr malfunction. Pull and clean with carb cleaner and wire brush. Put back on (with new gasket) it will go away... vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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