To change between H4 and L4, stop completely, select N, push and turn the four-wheel-drive control to the desired range, and keep N selected until the low-speed indicator finishes changing.
Check that your vehicle has it.
Verified in the 2025 U.S. Lexus GX 550 owner's manual. H4 is the normal range; L4 is for steep grades, off-road driving and hard pulling in sand or mud.
- Retail trim / version
- GX 550 Premium, GX 550 Premium+, GX 550 Luxury, GX 550 Luxury+, GX 550 Overtrail, GX 550 Overtrail+, 2025 GX 550
- Required equipment / service
- Full-time 4WD, H4/L4 transfer control and low-speed indicator
Does the documented scope match your car?
This check combines the verified year, any source-supported powertrain scope, source-named trim/package and required equipment. It does not read a VIN or factory build record.
Published availability and qualifications
Verified in the 2025 U.S. Lexus GX 550 owner's manual. H4 is the normal range; L4 is for steep grades, off-road driving and hard pulling in sand or mud.
Know what kind of control to look for.
This original category diagram is an orientation aid, not a picture of your exact trim. Use the written labels and your vehicle manual to identify the real control.
Step by step.
- 01
Choose H4 for normal driving or L4 only when maximum low-speed power and traction are needed off-road.
- 02
Stop the GX completely and move the shift lever to N.
- 03
Push and turn the four-wheel-drive control to L4 or H4 as required.
- 04
Keep the vehicle stopped in N until the low-speed four-wheel-drive indicator finishes blinking and turns fully on for L4 or fully off for H4.
Important limits
- Never move the transfer control while wheels have lost traction, and do not move the shifter before the range change is complete.
- An incomplete range shift can leave the driveline disconnected even with P selected, allowing the vehicle to roll.
Quick checks.
- ✓If the low-speed indicator keeps blinking, stop fully, select N and request the range again.
- ✓In very cold conditions, warm the engine as instructed by the display; persistent blinking requires Lexus dealer inspection.
What happened on your vehicle?
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2025 Lexus GX 550 Owner's Manual — Four-Wheel Drive System
Relevant section or page: Pages 386–388. We use the written official source to determine the steps and applicability shown above.
Reviewed with a visible trail.
Scope and steps were checked by Car Cheat Codes Editorial Review. A guide is narrowed or corrected when the source does not support a broader claim.
- Published
- Last modified
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Guide change history
- Initial verified publication.