LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Electrical Component Locations >> Electrical Component Locator And Harness Routing Views >> Component Locator >> Powertrain Component Views >> Engine Components - Top
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Components - Top

GM5639098Courtesy of GENERAL MOTORS COMPANY
Engine Components - Top

Component Name Callout
M129A Intake Camshaft Profile Actuator 1 M129A Intake Camshaft Profile Actuator 1 1
T8A Ignition Coil 1 T8A Ignition Coil 1 2
B52A Heated Oxygen Sensor 1 B52A Heated Oxygen Sensor 1 3
M130B Exhaust Camshaft Profile Actuator 2 M130B Exhaust Camshaft Profile Actuator 2 4
T8B Ignition Coil 2 T8B Ignition Coil 2 5
M130C Exhaust Camshaft Profile Actuator 3 M130C Exhaust Camshaft Profile Actuator 3 6
T8C Ignition Coil 3 T8C Ignition Coil 3 7
Q12 Evaporative Emission Canister Purge Solenoid Valve Q12 Evaporative Emission Canister Purge Solenoid Valve 8
B34E Engine Coolant Temperature Sensor 5 B34E Engine Coolant Temperature Sensor 5 9
B321 Crankcase Pressure Sensor B321 Crankcase Pressure Sensor 10
B23E Camshaft Position Sensor - Exhaust B23E Camshaft Position Sensor - Exhaust 11
T8D Ignition Coil 4 T8D Ignition Coil 4 12
G18 Fuel Pump - High Pressure G18 Fuel Pump - High Pressure 13
M129D Intake Camshaft Profile Actuator 4 M129D Intake Camshaft Profile Actuator 4 14
M129C Intake Camshaft Profile Actuator 3 M129C Intake Camshaft Profile Actuator 3 15
M129B Intake Camshaft Profile Actuator 2 M129B Intake Camshaft Profile Actuator 2 16