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LS1 · 1998–2002 · YEAR FIRST

LS1 Reference by Year

Pick the car's exact model year first. Year-specific specs stay with that year; shared LS1 information is kept separate below.

PAGE SCOPELS119981999200020012002
Published year references on this page: LS1 · 1998, 1999, 2000, 2001, 2002. Use the year-specific material shown on the page rather than assuming every item applies across the full engine generation.

On this page

Jump straight to the published section you need.

Firing order ↓Torque & capacities ↓Spark plugs ↓
START WITH THE MODEL YEAR
Do not use a 2001 value just because the car is an LS1. Open the exact year, then follow any condition, transmission or service notes attached to that value.
CHOOSE YOUR LS1 YEAR
1998 · LS11998 fuel pressure and owner-manual capacities. 1999 · LS11999 capacities and service reference. 2000 · LS12000 capacities and service reference. 2001 · LS12001 plug data, capacities and 4L60-E production-change notes. 2002 · LS12002 fuel, cooling, torque, maintenance and key-off draw reference.
SHARED LS1 BASICS

Firing order

1-8-7-2-6-5-4-3

This firing order applies to the LS1, but cylinder location and the exact model-year diagnostic procedure still matter when chasing a misfire.

↑ On this page

Torque & capacities

Use the exact year section above. Do not carry a familiar torque or capacity from one LS1 model year into another without checking the application and service condition.

↑ On this page

Spark plugs

Plug part numbers, gap notes and torque conditions can differ by year or service condition. Use the year section first, then the dedicated spark-plug page when needed.

LS1 spark-plug reference →

1998–2002 LS1 DIAGNOSTICS

These symptom guides cover the LS1 range shown on each page. When a test calls for a number, wiring detail or control threshold, use the exact model-year information for the car.

LS1 Diagnostic CenterStart with what the car is doing. Cranks But Won't StartSpark, fuel pressure and injector command in order. Misfire / P0300–P0308Separate random from cylinder-specific faults. OverheatingTemperature, coolant integrity, airflow and circulation.
YEAR-SPECIFIC NUMBERS STAY WITH THE YEAR
Shared diagnostic logic can span several LS1 years. Numeric specs, capacities, production changes and service conditions stay under the model year or application that actually owns them.

Related on FPV

LS1 diagnostics →