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Brands/GMC/Syclone
GMC Syclone

Photo: Wikimedia Commons (CC)

GMC

GMC Syclone

Pick-up · Gas · 1 version · owner report

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280Hp

Power

4.6s

0–62 mph (0–100 km/h)

126mph

Top speed (203 km/h)

What owners say

Our take, from owner reports

The sentiment is overwhelmingly positive, characterized by reverence for its historical performance and status as a collectible icon.

2 problems reported (2 isolated) · medium confidence

Problems owners report

  • IsolatedSevere rear main seal leak

    Described as a major leak losing approximately half a quart of oil in 18 minutes of idling, requiring engine removal to repair.

  • IsolatedUndisclosed condition issues in used sales

    Sellers failing to disclose accidents, repaints, or major mechanical problems.

The version owners recommend

Insufficient owner data available. The data only references the singular 1991 model year.

Competitors to consider

Owners compare it most often with the Ferrari 348, GMC Typhoon, Ford F-150 Lightning (original), Ram TRX and Rivian R1T.

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Overall sentiment

The sentiment is overwhelmingly positive, characterized by reverence for its historical performance and status as a collectible icon. Owner discussions consistently highlight its exceptional acceleration for its era, with specific reference to a period comparison test where it outperformed a Ferrari 348 in a straight line. It is celebrated as a unique and groundbreaking "muscle truck" that combined utility with supercar-rivaling straight-line speed in the early 1990s. The vehicle is viewed as a significant piece of automotive history. However, a single, detailed buyer experience report reveals a significant negative incident involving an undisclosed severe mechanical issue (a major rear main seal leak) on a purchased example, highlighting the critical importance of thorough pre-purchase inspections for used models.

Positioning vs competitors

Positioned as a pioneering high-performance truck that redefined expectations for acceleration in a utility vehicle. It is directly compared to its sibling, the GMC Typhoon (SUV version), with both seen as part of the same legendary series. Its historical claim to fame is beating contemporary exotic sports cars like the Ferrari 348 in drag races, though it is noted that its brick-like aerodynamics limited top-end speed. In modern contexts, it is mentioned alongside contemporary high-performance trucks like the Ram TRX and Rivian R1T as part of a lineage of "fast trucks." It is also grouped with other unexpected domestic performance vehicles of its time, such as the Buick Grand National, as "Corvette killers" that operated outside of GM's traditional performance hierarchy.

Recommended configurations

Insufficient owner data available. No specific trim or option recommendations are discussed in the provided owner feedback.

General recommendations

Suitable for collectors and enthusiasts seeking a legendary piece of 1990s performance history. NOT recommended for buyers who do not perform exhaustive pre-purchase inspections, given the potential for undisclosed major mechanical issues in used examples. Buyers are strongly cautioned to verify condition thoroughly, ask specific questions about leaks and accident history, and be wary of misleading descriptions from sellers, particularly in online auction environments. Considered a poor value if purchased with significant hidden defects.

Remarks

The vehicle's legendary status is heavily anchored to a specific 1991 Car and Driver comparison test where it defeated a Ferrari 348 in acceleration, a fact repeatedly cited in owner discussions. The turbocharged 4.3L V6 engine (RPO LB4 with ZR9 code) is noted for its specific upgrades, including a Mitsubishi turbocharger, Garrett intercooler, hypereutectic pistons, and a Corvette-derived throttle body, producing 280 hp and 360 lb-ft of torque. The single negative ownership report, involving a $40,000 purchase followed by the discovery of a severe oil leak, underscores the high stakes and risks associated with buying used collector vehicles without proper verification. Analysis based on approximately 50 substantive owner discussions and historical references.

Specifications

Not sold in North America: these versions are from other markets.

4.3 i V6

4.3L 6-cylinder · 280 hp · AWD · automatic

Built 1991–1993

Power280 Hp
Torque350 lb-ft (475 Nm)
0–62 mph (0–100 km/h)4.6 sec
Top speed126 mph (203 km/h)
DriveAll wheel drive (4x4)
Transmission4 gears, automatic transmission
Engine4.3 L
AspirationTurbocharger, Intercooler
Cylinders6
Seats3 seats
Fuel typeGas
Body typePick-up

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Quick facts

Brand
GMC
Versions catalogued
1
Body types
Pick-up
Owner report
Available

Compare with

  • Syclone vs GMC Typhoon
  • Syclone vs Ferrari 348

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