This is the power brake booster for 2012-2013 Chevrolet Impala and 2014 Chevrolet Impala Limited vehicles equipped with the 3.6L engine. This brake booster comes with the check valve installed. The check valve is manufactured by Bosch. This brake booster is CODE AADP. This part still has the protective plastic film covering the opening. Replace your old, faulty part with this brand new factory original part from General Motors at a fraction of the dealer price.

New. Never Installed. OEM Part. Bulk Overstock

GM Part # 20864348

Alternate GM part # 23209402 ; 11611821

ACDelco Part # 178-0862 ; 1780862

Bosch Check Valve Part #'s 20876799 ; 0 265 005 321

Item is number 1 in the GM diagram. Also includes numbers 2, 3, and 4 in the diagram