37
verified 1998 gmc engines
1998 Used GMC Engines For Sale
37 verified 1998 GMC engines in stock — Savana 1500/2500/3500 vans, Sierra C/K 2500 & 3500 pickups, Suburban, Yukon, S10/S15/Sonoma, Jimmy/Envoy and Safari — covering the 2.2L four, 4.3L Vortec V6, 5.0L & 5.7L V8, 6.5L turbo-diesel and 7.4L big-block (gasoline and CNG fuel systems). VIN-matched to your vehicle, compression-tested by ASE-certified technicians, photographed before shipment, backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.
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Compression-Tested & Verified
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Free Nationwide Shipping
Browse 1998 GMC Engines by Model
Pick your 1998 GMC model to see exact fitments in stock. Not sure which engine code fits? Text us your VIN and a specialist confirms the match before you order.
Why Buy a 1998 GMC Engine from Auto Power Source
Every 1998 GMC engine in our inventory is pulled from a low-mileage donor vehicle, cataloged by VIN, and held in our climate-controlled warehouse pending sale. Each unit goes through our six-step inspection — VIN-matching, compression testing, noise & smoke verification, full visual inspection, multi-angle photography, and palletized shipping. These late-GMT400 GMC trucks and vans run the Vortec family — the 4.3L V6, 5.0L and 5.7L V8s — plus the 6.5L Detroit turbo-diesel and the 7.4L big-block, and we keep both gasoline and factory-CNG fuel-system variants in stock.
Our ASE-certified technicians compression-test every cylinder and run a leak-down evaluation before any 1998 GMC engine is cleared for sale. You pay a fraction of dealer-new pricing for the same proven GM engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get up to a 3-year warranty plus 30-day money-back. Not sure whether your truck runs the 6.5L diesel or a 5.7L gas V8? Text your VIN and we will confirm.
📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →
Your 1998 GMC Engine Options: Compared
Most 1998 GMC owners face four real choices when their engine fails:
← Swipe sideways to see all columns →
| Option |
Cost |
Reliability |
Warranty |
Fitment Match |
| Used OEM (this collection) |
$$$ Best Value |
High |
Up to 3 years |
VIN-matched |
| New OEM (dealer) |
$$$$$ 2-4× more |
High |
Manufacturer |
Exact |
| Aftermarket / Reman |
$$$$ |
Varies |
6-12 mo |
May adapt |
| Junkyard |
$ Cheapest |
Unknown |
None |
DIY |
Tested used OEM hits the sweet spot — same GM engineering as new, fraction of the cost.
1998 GMC Engine Buying Guide
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Confirm the 8th-digit VIN engine code. 1998 GMC separates the 2.2L (VIN 4), 4.3L (VIN W/X), 5.0L (VIN M), 5.7L (VIN R), 6.5L diesel (VIN F/S) and 7.4L (VIN J) this way — same vehicle, different engines.
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Gas vs. turbo-diesel. The 6.5L is a Detroit turbo-diesel (VIN F or S) — a completely different engine from the 5.7L and 7.4L gas V8s and never interchangeable.
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CNG vs. gasoline. Several 1998 Savana and Sierra/C-K 5.7L units left the factory as compressed-natural-gas (CNG) — confirm the fuel system before ordering.
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Match series and drivetrain. 1500 / 2500 / 3500 light- and heavy-duty trucks and vans, plus 2WD vs 4WD, differ in oil pan, mounts and accessory brackets.
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Check build-date option ZN4. On 1998 S10/S15/Sonoma, Jimmy and Envoy 4.3L units, the with/without ZN4 build-date split changes the correct engine — note it from your VIN.
Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.
Frequently Asked Questions
What is the warranty on a 1998 GMC engine?
Up to 3 years, depending on the specific unit. The exact warranty term is listed on each product page.
What does compression-tested mean?
ASE-certified technicians compression-test every cylinder and run a leak-down evaluation before the engine is cleared for sale.
How long until delivery?
Prep and ship time is 3-5 business days. Transit time is 2-3 business days via freight carrier after dispatch.
Can I see photos before I buy?
Yes. Multi-angle photos of the actual unit are sent before payment.
Do I need my VIN?
Strongly recommended. 1998 GMC engines vary by displacement, fuel system (gas / CNG / diesel), series and drivetrain.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
Why is a used OEM engine cheaper than the dealer?
You get the same GM-engineered unit from a low-mileage donor without new-part markup — a fraction of dealer pricing, still VIN-matched, tested and warrantied.
When can I reach your team?
Our specialists are available 24 hours a day, Monday through Saturday, by phone at 1-877-313-8995 or by text.
46,000+
engines + transmissions shipped
0%
fitment-related returns
All 50
states covered, free freight
Excellent
Customer Reviews
rated on Trustpilot
Our 6-Step Inspection & Shipping Process
Every 1998 GMC engine we ship has been through these six steps:
1. VIN-MatchingWe match the donor VIN to your VIN to confirm engine code, fuel system, emissions calibration, and drivetrain fit.
2. Tested & VerifiedASE-certified technicians compression-test every cylinder and run a leak-down evaluation on each engine.
3. Noise & Smoke VerificationUnits are run to verify normal mechanical sound and clean operation — catches wear static tests miss.
4. Visual InspectionEvery accessible component is inspected: intake, manifolds, valve covers, accessories, sensor harnesses.
5. Photograph & CatalogMulti-angle photos sent to you BEFORE we ship, for your approval.
6. Palletize & ShipStrapped on a heavy-duty wooden pallet, shipped via freight at no charge.
What Our Customers Say
Rated Excellent by our customers on Trustpilot.
★★★★★
Transaction was perfect
"Found me the right engine at a great price. Got it in 2 days and installed the car the next day. Runs absolutely beautiful."
— Kevin Graham, 2026-04-29
★★★★★
Repeat customer
"AutoPowerSource is a great company. I've used them several times for used motors. Low mileage when other companies gave up."
— Curtis Haines, 2025-12-23
★★★★★
Highly recommend Mike
"Mike reached out first thing in the morning regarding my inquiry for a used engine. Very informative and helpful."
— Beatrice, 2026-03-31
★★★★★
Great experience
"Daisy kept me in the loop every step. My original engine was damaged before shipping; she found a different one quickly."
— Bryan Perkins, 2026-03-25
Our Photos-Before-Shipment Guarantee
Before any 1998 GMC engine leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and up to a 3-year warranty.
✉ Email Us at info@autopowersource.com
