6.2L V8 Engine Complete Assembly for 2022-2026 Cadillac, Chevrolet, & GMC

A quick look at your own vehicle makes sure the right engine shows up:

• Verify your VIN's 8th digit is L
• Check your RPO codes for L87
• Confirm drivetrain configuration (2WD vs 4WD/AWD) and oil pan clearance
• Inspect the vacuum pump setup to ensure compatibility with the electric pump system

What the install really takes — plan and budget with confidence:

Special tools this job needs:

• Crankshaft balancer installer/remover tool (e.g., EN-51222)
• Injector remover/installer tool (e.g., EN-51146)
• GM-specific fuel line disconnect tools
• Professional-grade scan tool

Budget for these consumables at install:

• 8.0 quarts of dexosR-approved 0W-40 full synthetic oil (or 0W-20 depending on specific vehicle recall status)
• ACDelco PF63 oil filter (or equivalent high-quality filter)
• GM-approved Dex-Cool coolant (50/50 pre-diluted mixture)
• 8 new OE-spec iridium spark plugs
• Exhaust manifold gaskets
• Intake manifold gaskets
• Front/rear crankshaft seals
• Crankshaft balancer bolt (one-time use TTY)
• Flywheel/flexplate bolts (one-time use TTY)

What your vehicle’s computers will need after the swap:

What’s involved: Crankshaft Position (CKP) System Variation Relearn (CASE Relearn), Throttle Body Idle Relearn, and Security/Immobilizer Re-marriage

Vehicles from this era use GM's Global B electrical architecture, which integrates security functions across multiple modules. At a minimum, a security/immobilizer re-marriage procedure must be performed to allow the engine to start and run in the new vehicle. Additionally, a Crankshaft Position (CKP) System Variation Learn Procedure is required after installation using a GM-approved dealership scan tool (like the MDI 2) and access to GM's Technical Information System (TIS).

Pro tips for a smooth first start-up — hand them to whoever does the install:

• The 0W-40 Oil Mandate: You must use dexosR 0W-40 oil. Do not use the 0W-20 oil listed in older owner's manuals. GM changed this specification permanently to increase oil film thickness and protect the rod bearings.
• Torque-to-Yield (TTY) Balancer Bolt: The crankshaft balancer bolt is a single-use TTY fastener. Reusing the old bolt will cause it to stretch, lose clamping force, and potentially back out.
• Direct Injection Fuel System Safety: The direct injection system operates at extremely high pressures (up to 2,900+ PSI). You must relieve the fuel system pressure before disconnecting any lines.
• DFM Solenoid Connector Fragility: The wiring harness connector for the Dynamic Fuel Management (DFM) solenoid block is extremely fragile.
• Ground Straps: Pay meticulous attention to the location, condition, and tightness of all engine and body ground straps to avoid bizarre electrical problems.

Easy to get right once you know them:

• Reusing the Crankshaft Balancer Bolt: Reusing the balancer bolt to save money can cause the balancer to wobble loose, ruining the crankshaft snout.
• Using 0W-20 Oil: Many owners and independent shops blindly follow the original oil cap or older databases and put 0W-20 into the L87, increasing the risk of spinning a rod bearing.
• Skipping the Crankshaft Relearn: Skipping the scan-tool-guided Crankshaft Position Relearn leads to mysterious misfires, rough idling, or a persistent Check Engine Light (P0315 code).
• Not Checking the Oil Level Frequently: The L87 is known to consume up to 1–2 quarts of oil between changes. Running low on oil starves the lifters and bearings.
• Failing to Program the ECU: Completing the physical swap without arranging for Global B security programming beforehand, resulting in an unresolved no-start condition.

Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer: