Au7o mascotAu7o
Known IssuesTest Hub demo
  1. Au7o
  2. /
  3. Known Issues
  4. /
  5. Buick
  6. /
  7. Park Avenue
Buick · Known Issues

2000 Buick Park Avenue Problems: 2 Known Issues

2000 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

Share:@au7o.io

2000 · All trims · All engines

Choose the year and equipment for your written issues and visual request.

No email neededHow interest is saved

Interest applies to the selected vehicle and configuration; it is not a reservation. Voting stores a first-party identifier for up to 180 days to prevent repeat votes. No account or email is needed. Clearing cookies or using another device may count separately. Privacy

Visual coming soon

Your interest helps us choose what to build next.

Visual Known Issues · Coming soon

$4.99/month plus taxes at launch · No payment today

Preview the XT6 example
Known IssuesMotorcycle IssuesDTC LookupDrivePricingAboutTermsPrivacyCookiesConsentData rightsCopyrightFeedback
Share:@au7o.io

Vehicle data and repair guidance on this site are compiled with AI assistance and may contain errors. Always verify with your service manual or a qualified mechanic.

Data protection representation

DataRep representative in the United KingdomDataRep representative in the European Union
Au7o · 2026
Built for DIY mechanics. Privacy-first.
Explore free Hub demo
Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2000 Buick Park Avenue has 2 documented known issues, with 2 rated critical. The most serious are Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000) and Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak ($400-$1,200 repair). Across all issues with published estimates, repair costs range from $400 to $1,200. DIY maintenance guides at au7o.io.

In This Article

  • Park Avenue Fuel System1
  • Park Avenue Engine1
  • Recalls2
  • FAQ
Get Started
Back to top

In This Article

  • Fuel System1
  • Engine1
  • Recalls2
  • FAQ

All 2 Known Issues

Filter:
ALL YEARS20052004200320022001200019991998199719961995

On the 1998-2000 Buick Park Avenue, the 1998-2000 Park Avenue's 3800 V6 (L36) engine was built with certain Delphi fuel pressure regulators that NHTSA found leak at a much higher than usual rate. On the Park Avenue, a leaking regulator lets fuel pass into the intake manifold through a vacuum line. If the engine is cranked and does not start, that pooled fuel combined with a mistimed spark can produce a backfire. NHTSA's consequence statement is what makes this serious: the backfire can rupture the intake manifold, and the rupture can displace a fuel line and pull an injector out of position, producing a fuel leak and a possible fire. GM ran the recall in phased owner mailings, with Phase 1 starting June 30, 2004 and Phase 2 on September 30, 2004. The campaign covered 910,873 vehicles in total across all of the models included in it.

Common Symptoms

  • Engine cranks but will not start
  • Backfire when cranking the engine
  • Smell of raw fuel around the engine
  • Visible fuel leakage at the fuel pressure regulator

How to Fix

The recall remedy is free at any Buick dealer: the dealer installs a new fuel pressure regulator built with an improved diaphragm. Because this campaign was mailed out in two phases back in 2004, plenty of Park Avenues changed hands before the notice reached the right owner, so an unrepaired car is entirely possible. Enter your VIN at nhtsa.gov/recalls to see whether recall 04V090000 is still open on your car; if it is, book the repair with a Buick dealer. Buick's recall line for this campaign was 1-866-608-8080.

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 1995-2005 Buick Park Avenue, the 3800 Series II (and early III) V6 in Park Avenue, LeSabre, Riviera, Regal, Lucerne — and shared Pontiac Bonneville/Grand Prix, Olds 88/LSS, Chevy Monte Carlo/Impala — suffers infamous lower intake manifold gasket failure. Plastic intake material softens under coolant exposure (especially Dex-Cool); gasket erodes and leaks coolant into the lifter valley, mixing with oil. Catastrophic if undetected.

This issue also affects: Buick LeSabre, Buick Cascada, Buick Enclave

Common Symptoms

  • coolant loss with no external leak
  • milky oil
  • overheating
  • sweet smell from exhaust
  • rough idle

How to Fix

Replace LIM gasket with updated Fel-Pro MS98003T (improved metal-reinforced design) — $400-$800 at independent. Replace upper intake plenum at the same time if cracked. Drain Dex-Cool and refill with Zerex G-05 or compatible HOAT. Inspect oil for coolant contamination at every change; milky oil means immediate teardown.

Typical repair cost:$400 - $1,200

Research This Issue

GoogleRedditYouTubeNHTSA
Manually Verified
High Confidence
NHTSA Recalls2 recalls

LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK

ON CERTAIN PASSENGER VEHICLES, THE EMERGENCY TRUNK RELEASE HANDLE MAY BE INSTALLED OR FORCED OUT OF THE PROPER POSITION.

Campaign #02V32800009/12/2002

VISIBILITY:WINDSHIELD WIPER/WASHER

VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THESE VEHICLES FAIL TO COMPLY WITH REQUIREMENTS OF FMVSS NO. 104, "WINDSHIELD WIPING AND WASHING SYSTEMS." THESE VEHICLES HAVE A WIPER SYSTEM MICROPROCESSOR THAT IS SUSCEPTIBLE TO VOLTAGE TRANSIENTS, WHICH CAN CAUSE A "LATCH-UP" CONDITION IN THE SYSTEM CONTROLLER.

Campaign #00V34600030/10/2000

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

🔧
A mechanic who knows YOUR exact car
Answers tuned to your year, make, model & trim — not generic advice. Save your garage so it always has the right context.
Get ahead of Buick Park Avenue problems — free
Leave your email and we'll alert you the moment there's a new recall or known issue for your Buick Park Avenue. Free, no account needed.

Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.

Other Buick Models

Buick Encore25Buick Cascada22Buick Regal13Buick Enclave13Buick Envision12Buick Encore GX12

Frequently Asked Questions

What are the most common Buick Park Avenue problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2000 Buick Park Avenue has 2 documented issues. The most frequently reported are: Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000), Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak. Of these, 2 are rated critical and should be addressed promptly.

Is the Buick Park Avenue reliable?

The 2000 Buick Park Avenue has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000) and Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Buick Park Avenue problems?

Repair costs for known Buick Park Avenue issues range from $400 to $1,200, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 1998-2000 Buick Park Avenue Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000)?

The 1998-2000 Park Avenue's 3800 V6 (L36) engine was built with certain Delphi fuel pressure regulators that NHTSA found leak at a much higher than usual rate. On the Park Avenue, a leaking regulator lets fuel pass into the intake manifold through a vacuum line. If the engine is… Severity: high.

What is the 1995-2005 Buick Park Avenue Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak?

The 3800 Series II (and early III) V6 in Park Avenue, LeSabre, Riviera, Regal, Lucerne — and shared Pontiac Bonneville/Grand Prix, Olds 88/LSS, Chevy Monte Carlo/Impala — suffers infamous lower intake manifold gasket failure. Plastic intake material softens under coolant exposure… Repairs typically run $400-$1,200. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.