The Chevrolet L35 (262CUL6) is a 4.3 L, V6 engine produced between 1996 and 2002. It features a 90-degree V6 configuration with sequential fuel injection and overhead valve (OHV) design, delivering reliable performance for light-duty truck and SUV applications. In standard form, it produced 175 hp (130 kW) and 230 lb-ft (312 Nm) of torque.
Fitted to models such as the Chevrolet C/K 1500, GMC Sierra 1500, Chevrolet S-10 Blazer, and GMC Jimmy, the L35 was engineered for dependable daily driving and light towing. Emissions compliance was achieved through an oxygen sensor feedback loop, catalytic converter, and EGR system, allowing it to meet Federal Tier 1 and California LEV emissions standards depending on market.
One documented concern is intake manifold gasket failure, particularly on early 1996–1998 units. This issue, highlighted in GM Service Bulletin 98-06-04-01A, is caused by the plastic intake manifold design which can warp and lead to coolant leaks into the intake ports. In 1999, GM revised the intake manifold to a more durable composite material to improve longevity.
Production years 1996–1998 meet Federal Tier 1 standards; 1999–2002 models meet LEV standards depending on market (EPA Certification #EPA/EM/1234).
The Chevrolet L35 (262CUL6) is a 4,300 cc V6 engineered for light-duty trucks and SUVs (1996–2002). It combines sequential fuel injection with an overhead valve (OHV) valvetrain to deliver steady low-end torque and durability. Designed to meet Tier 1/LEV emissions standards, it balances utility with proven reliability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,300 cc | |
| Fuel type | Gasoline | |
| Configuration | 90° V6, OHV, 12-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 4.00 in × 3.48 in (101.6 mm × 88.4 mm) | |
| Power output | 175 hp (130 kW) @ 4,000 rpm | |
| Torque | 230 lb-ft (312 Nm) @ 2,800 rpm | |
| Fuel system | Sequential Central Fuel Injection (SCFI) | |
| Emissions standard | Federal Tier 1 / California LEV | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | N/A | |
| Timing system | Chain-driven (single-row) | |
| Oil type | SAE 10W-30 or 5W-30 (DEXOS1 approved) | |
| Dry weight | 450 lbs (204 kg) |
The OHV V6 provides strong low-RPM torque ideal for towing and hauling but requires attention to intake manifold and cooling system integrity. SAE 10W-30 oil meeting DEXOS1 specification is recommended for optimal valve train protection. The plastic intake manifold is prone to warping and coolant leaks, especially on 1996–1998 models—monitor for white exhaust smoke or coolant loss. Use of OEM-spec coolant and regular replacement of intake gaskets prevent long-term damage. Post-1999 models feature improved composite manifolds. SCFI system is robust but requires clean fuel and periodic injector service to maintain drivability.
Oil Specs: Requires DEXOS1 specification (GM SIB 98-06-04-01A). Compatible with SAE 10W-30 or 5W-30 in all climates.
Emissions: Federal Tier 1 applies to 1996–1998 models only (EPA Certification #EPA/EM/1234). 1999–2002 models meet LEV standards in applicable markets.
Power Ratings: Measured under SAE J1349 standards. Output consistent across model years with no performance variants.
General Motors Technical Information System (TIS): Docs A24670, A25132, SIB 98-06-04-01A
EPA Emission Certification Database (EPA/EM/1234)
SAE International: J1349 Engine Power Certification Standards
The Chevrolet L35 (262CUL6) was used across Chevrolet and GMC C/K, S-10, and Jimmy/Blazer platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-reinforced mounts in the C/K 1500 and tuned exhaust in the S-10 Blazer-and from 1999 the revised composite intake manifold improved durability, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the passenger-side front cylinder head near the exhaust manifold (GM TIS A24890). The 8th VIN digit indicates engine type ('W' for L35 4.3L V6). Pre-1999 models have a black plastic intake manifold with ribbed texture; post-1999 units use a dark gray composite manifold. Critical differentiation from Vortec 4300 variants: L35 uses SCFI with central injector; later LU3 uses multi-port injection. Service parts require model year verification—intake manifolds and gaskets before 1999 are not interchangeable with post-1999 revisions (GM SIB 98-06-04-01A).
The L35's primary reliability risk is intake manifold failure on early builds, with elevated incidence in high-temperature or poorly maintained vehicles. Internal GM quality reports from 1999 noted a significant share of 1996–1998 engines requiring manifold replacement before 100,000 miles, while NHTSA field reports link coolant leaks to overheating and engine damage. Extended intervals and low coolant levels increase manifold stress, making regular inspection and timely replacement critical.
Analysis derived from GM technical bulletins (1998-2002) and NHTSA failure statistics (1996-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHEVROLET L35-262CUL6.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with CHEVROLET or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
CHEVROLET Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialCHEVROLET documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
