Car care · Elgin Auto Sales & Service Center · Elgin, IL
Hill Start Assist: What It Does and How It Works
Hill start assist (HSA) briefly holds your brakes when you move your foot from the brake to the gas on a hill. Here is how two 2026 owner's manuals describe it, when it works, and what it will not do.
Short holdbrake pressure kept briefly after you release the pedal
Uphill gearforward facing uphill, Reverse backing uphill
Not in P or Nit will not activate in Park or Neutral
Not a parking brakealways set the parking brake
The short answer
Hill start assist is designed to reduce roll back when you pull away from a complete stop on an incline. When you release the brake on a hill, HSA keeps holding brake pressure for a short time. If you do not press the accelerator before that time runs out, it releases the brakes and the vehicle rolls as it normally would.
How hill start assist works
The 2026 Ram 1500 and 2026 Dodge Charger manuals describe HSA in the same words: it is designed to mitigate roll back from a complete stop while on an incline. If the driver releases the brake while stopped on an incline, HSA will continue to hold the brake pressure for a short period.
If you do not apply the throttle before that time expires, the system releases brake pressure and the vehicle will roll down the hill as normal.
From the 2026 Ram 1500 Owner's Manual (p. 283) and the 2026 Dodge Charger Owner's Manual (p. 207), read November 9, 2026.
When hill start assist activates
Both manuals list the same conditions. All must be met:
| # | Condition |
|---|---|
| 1 | The feature must be enabled |
| 2 | The vehicle must be stopped |
| 3 | The parking brake must be off |
| 4 | The driver door must be closed |
| 5 | The vehicle must be on a sufficient grade |
| 6 | The gear must match the uphill direction: a forward gear when facing uphill, Reverse when backing uphill |
From the 2026 Ram 1500 Owner's Manual (p. 283) and the 2026 Dodge Charger Owner's Manual (p. 207), read November 9, 2026.
HSA works in Reverse and all forward gears. It will not activate in Park or Neutral.
Why your car can still roll back
HSA has limits. Both manuals warn that there may be situations where it will not activate and slight rolling may occur, such as on minor hills, with a loaded vehicle, or while pulling a trailer.
They also stress that HSA is not a substitute for active driving involvement: it is always the driver's responsibility to watch the distance to other vehicles, people and objects and, most importantly, to operate the brakes. The Ram manual adds that HSA is not a parking brake. Always apply the parking brake fully when leaving the vehicle and put it in Park.
From the 2026 Ram 1500 Owner's Manual (p. 283) and the 2026 Dodge Charger Owner's Manual (p. 207), read November 9, 2026.
Hill start assist when towing
On the 2026 Ram 1500, HSA also helps reduce roll back while towing a trailer. The manual warns, though, that if your trailer brake controller turns the trailer brakes on and off with the brake switch, there may not be enough brake pressure to hold both the truck and trailer on a hill when you release the pedal. To avoid rolling back, manually activate the trailer brake or apply more vehicle brake pressure before releasing the brake pedal.
For the 2026 Charger, the question does not come up: its manual says trailer towing with that vehicle is not recommended.
From the 2026 Ram 1500 Owner's Manual (p. 283) and the 2026 Dodge Charger Owner's Manual (p. 171), read November 9, 2026.
Hill start assist vs low-speed off-road control
HSA helps you pull away. Controlling low speed off road is a different job. On the 2026 Ram 1500, that job belongs to Selec-Speed Control (SSC), if equipped. The manual says SSC is intended for off-road driving in 4WD Low only and maintains vehicle speed by actively controlling engine torque and brakes.
SSC is enabled with its switch when the truck is in 4WD Low below 5 mph, with the parking brake released, the driver door closed and no accelerator applied. It activates once you release both pedals with the truck out of Park at speeds below 20 mph, and you choose the set speed with the gear shift +/-; for example, 0.6 mph in first and 5 mph in eighth. You can override it at any time with the accelerator or brake. The Ram manual also refers to Hill Descent Control alongside Selec-Speed Control; for example, it says AutoStick is not active when Selec-Speed or Hill Descent Control is enabled.
From the 2026 Ram 1500 Owner's Manual, Selec-Speed Control (pp. 283-284) and AutoStick (p. 197), read November 9, 2026.
Turning hill start assist on or off
HSA can be turned on or off. On the 2026 Charger, the manual says this is done through the vehicle settings in the Uconnect system, and the Ram 1500 manual also points to the Uconnect settings.
From the 2026 Ram 1500 Owner's Manual (p. 283) and the 2026 Dodge Charger Owner's Manual (p. 207), read November 9, 2026.
Brake service at Elgin Auto Sales & Service Center
Car rolling back more than it used to, or a brake or stability warning on the dash? Schedule service or see our service specials.
Our service department at 1200 E. Chicago St. in Elgin is open Monday to Friday 8 a.m. to 5 p.m. and Saturday 8 a.m. to 4 p.m., and is closed Sunday. Get directions.
Hill start assist FAQ
What does hill start assist do?
It is designed to reduce roll back from a complete stop on an incline by holding brake pressure for a short period after you release the brake pedal.
How long does hill start assist hold the car?
The manuals describe it only as a short period. If you do not press the accelerator before it ends, the brakes release and the vehicle rolls as normal.
Why did my car roll back with hill start assist on?
Manuals say it may not activate on minor hills, with a loaded vehicle or while pulling a trailer, and it needs conditions like a closed driver door and the parking brake off.
Does hill start assist work in reverse?
Yes. It works in Reverse when backing uphill and in all forward gears when facing uphill, but not in Park or Neutral.
Is hill start assist the same as a parking brake?
No. The Ram 1500 manual says HSA is not a parking brake. Always apply the parking brake fully and shift to Park when you leave the vehicle.
What are your service hours?
Monday to Friday 8 a.m. to 5 p.m. and Saturday 8 a.m. to 4 p.m. We are closed Sunday.
Want your brakes checked?
Visit us at 1200 E. Chicago St. in Elgin.
Sources
Hill start assist and Selec-Speed Control information is from the 2026 Ram 1500 and 2026 Dodge Charger owner's manuals, read November 9, 2026. Not every vehicle has these features, and other brands may work differently; follow your own manual. Your own vehicle's labels and owner's manual are the authority for your vehicle. Our address and service hours are from our own website, checked the same day. Photo is of our dealership.
- 2026 Ram 1500 Owner's Manual (Mopar): AutoStick (PDF p. 199); Hill Start Assist and Selec-Speed Control (PDF pp. 285-286), FCA US LLC via vehicleinfo.mopar.com, read November 9, 2026
- 2026 Dodge Charger Owner's Manual (Mopar): Trailer Towing (PDF p. 173); Hill Start Assist (PDF p. 209), FCA US LLC via vehicleinfo.mopar.com, read November 9, 2026
- Service page: address and hours, Elgin Auto Sales & Service Center, read November 9, 2026