Collection: Used Pontiac Engines For Sale!

Browse Pontiac Engines by Year

Pick your model year for VIN-matched inventory. More year pages coming online weekly — if your year is not yet linked, text us your VIN and we will match you.

Pontiac Engines We Cover

Real engines from our warehouse, tested and ready to ship. Our Pontiac inventory spans every major engine family Pontiac has produced for the U.S. market.

3.8L L36 / L67 Supercharged V6

Grand Prix GT/GTP (1997-2008), Bonneville, Firebird 3.8. GM 3800 Series II/III 3.8L V6 — naturally-aspirated (L36) and supercharged (L67 GTP). LOWER INTAKE MANIFOLD GASKET (Dexcool coolant intrusion) is the defining failure — we inspect and disclose on every 3.8L.

LS1 5.7L V8 (GTO / Firebird)

GTO (2004), Firebird/Trans Am (1998-2002). GM Gen III LS1 5.7L V8 — pre-AFM, pre-DoD. Enthusiast-driven demand, verify no aftermarket tuning via ECU pull and no track abuse. Iconic engine, robust when unmodified.

2.4L Ecotec L61/LE5 I4

G6 base, G5, Vibe 2.4 (later years), Solstice base. GM Ecotec 2.4L four across Cobalt/HHR/G5/G6 shared. Timing chain wear past 100K is documented. Not the high-output LNF turbo variant — verify code.

3.6L LY7 V6

G6 GTP/GXP (2006-2009), Torrent 3.6, G8 3.6 base. GM LY7 3.6L V6 with direct injection variants (LLT). Timing chain wear past 100K is documented on LY7 and LLT variants. Cross-brand shared with Cadillac CTS, Buick Enclave, Chevy Traverse.

5.3L L33/LC9 V8 (G8)

G8 GT (2008-2009). GM Gen IV LS-based 5.3L V8 with AFM (Active Fuel Management) — AFM LIFTER FAILURE is documented on high-mileage units. Symptoms include tick, misfire, and cylinder-drop codes. We inspect AFM lifters on every unit.

6.2L LS3 V8 (G8 GXP)

G8 GXP (2009 ONLY). GM LS3 6.2L V8 — high-output, Corvette-shared. Extremely limited production (only 1,829 G8 GXP built), specialist sourcing typical. High collector premium, verify no track abuse.

2.0L LSJ / LNF Turbo Ecotec (Solstice GXP)

Solstice GXP (2007-2009). GM LNF 2.0L direct-injection turbo four (LSJ supercharged was Saturn Sky Redline shared). Timing chain wear and PCV/carbon buildup are documented on LNF units. Verify no aftermarket tuning.

More Pontiac Engines

Plus Iron Duke 2.5L vintage variants and Vibe 1.8L 1ZZ (Toyota-shared) — text us your VIN.

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Why Buy a Used Pontiac Engine from Auto Power Source

Pontiac was discontinued in 2010, which makes every Pontiac engine a vintage donor sourcing exercise — supply comes from the finite pool of donor vehicles still in service. The core engine families split cleanly by era: the 3800 Series II/III 3.8L V6 (L36 naturally-aspirated, L67 supercharged) that powered Grand Prix, Bonneville, and Firebird 3.8 from the mid-90s through 2008; the LS1 5.7L V8 in 2004 GTO and Firebird/Trans Am 1998-2002; the GM Ecotec 2.4L L61/LE5 in G5/G6/Solstice base and Vibe later years; the GM LY7/LLT 3.6L V6 in G6 GTP/GXP and G8 base; and the two collector engines — the LS3 6.2L V8 in the 1,829-unit 2009 G8 GXP and the LS2 6.0L V8 in the 2005-2006 GTO. Cross-brand donor flexibility is the Pontiac buyer's biggest advantage: GM's LS-series V8s, 3800 V6s, Ecotec fours, and LY7/LLT V6s all cross-source cleanly from Chevy, Buick, GMC, and Cadillac donor vehicles.

Our 400+ Pontiac engines all come from low-mileage donor vehicles, cataloged by VIN, and held in our climate-controlled warehouse. Every unit clears our six-step process: VIN-matched to donor and target, ASE-certified compression test on every cylinder, leak-down evaluation, run-stand noise & smoke verification, visual inspection, multi-angle photographs for your approval, and palletized freight. On 3800 L36/L67 units we specifically inspect lower intake manifold gasket condition and disclose Dexcool history. On L67 supercharged units we inspect supercharger snout/coupler wear. On 5.3L G8 GT units we inspect AFM lifter condition. On LS1/LS3 performance units we verify no aftermarket tuning history via ECU data pull. On LS3 GXP units we handle sourcing individually — specialist demand, specialist pricing.

You pay a fraction of dealer pricing for identical GM engineering, ship free on a heavy-duty pallet to any address in the continental U.S., and get 30 days from delivery to return — no restocking fees. Up to a 3-year warranty covers you after install. Across 100,000+ Engines+Transmissions In Stock, our fitment-related return rate stays at 0%.

Pontiac Engine Buying Guide

Five things to verify before buying a used Pontiac engine:

1. 3800 lower intake manifold gasket is the primary vintage risk. The GM 3800 Series II/III 3.8L V6 in L36 (naturally-aspirated) and L67 (supercharged) variants — Grand Prix, Bonneville, Firebird 3.8 — is famous for lower intake manifold gasket failure caused by Dexcool coolant intrusion. Symptoms include coolant loss, external gasket leak, and eventual overheating. Standard repair uses updated gasket sets. We inspect gasket condition and disclose prior repair history on every 3800.
2. L67 supercharger snout wear on high-mileage GTP units. The L67 supercharged 3.8L V6 in Grand Prix GTP and Bonneville SSEi uses an Eaton M90 supercharger — snout bearing wear and coupler failure are documented past 100K miles. Symptoms include whining, oil leaks, and eventual snout play. Snout rebuild is a well-documented service. We inspect snout play on every L67 unit before listing.
3. 5.3L G8 GT AFM lifter failure documented. The GM 5.3L Gen IV LS-based V8 in 2008-2009 G8 GT uses AFM (Active Fuel Management / cylinder deactivation) — AFM lifter collapse is documented on high-mileage units. Symptoms include ticking, misfires, and cylinder-drop codes. We inspect for AFM tick and cylinder-drop signs before listing every 5.3L G8. Consider LS3 G8 GXP as an AFM-free alternative if budget allows.
4. 2009 G8 GXP is 1,829 units — specialist sourcing. The Pontiac G8 GXP with LS3 6.2L V8 was produced only in the 2009 model year in a total volume of 1,829 units before Pontiac's discontinuation. Sourcing is specialist and demand-driven — text us your VIN and target chassis year for pricing and availability. Verify no track abuse via ECU data pull, and inspect for aftermarket modifications.
5. Brand discontinued 2010 — vintage donor pool only. Pontiac ceased production in 2010, so every Pontiac engine ships from a finite donor vehicle pool. Cross-brand GM sourcing is the buyer's biggest advantage: 3800 V6s cross-source from Buick and Oldsmobile, LS-series V8s from Chevy Corvette/Camaro/Silverado, Ecotec fours from Chevy Cobalt/HHR and Saturn Ion, LY7/LLT V6s from Chevy Traverse/Buick Enclave. Text us your VIN and target engine code for cross-brand donor matching.

Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.

Learn More: Pontiac Engine Guides

Practical guides from our team — how to install a used Pontiac engine, what to check on delivery, and what really matters when buying online.

APS Preinstallation Guide

Step-by-step guide to properly installing a used engine — what to inspect, prep, and torque before first start.

Post-Install Maintenance Checklist

Keep your used engine running like new — the break-in period, oil intervals, and warning signs to watch for.

5 Things to Know Before Buying

Warranty terms, VIN matching, mileage, testing, return policy — the checklist every buyer should run through.

After Delivery: Inspection Guide

What to check the moment your engine arrives — freight damage, matching numbers, and what to photograph.

Frequently Asked Questions

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