The Ram 1500 (2019+ DT platform) has a unique twist compared to other trucks: the DASM module — Drivers Assistance System Module — sits behind the windshield and combines both camera and radar sensors into a single unit. When you replace the windshield, the DASM must be recalibrated. Not just the camera. The entire module.
Nex Automotive replaces Ram 1500 windshields with OEM and OE-equivalent glass and performs complete DASM calibration in the same visit. No second trip to the dealer required.
Call (916) 472-2928 or request a quote at nexauto.us
The DASM: Why the Ram 1500 Is Different
Most vehicles separate the forward-facing camera and the radar sensor into distinct units. The Ram 1500 integrates both into a single windshield-mounted module called the DASM (Drivers Assistance System Module). This module handles:
- Forward Collision Warning — detects vehicles closing ahead
- Active Braking with Full Stop — applies brakes autonomously
- LaneSense Lane Departure Warning — detects unintentional lane drift
- Lane Keep Assist — provides corrective steering input
- Adaptive Cruise Control with Stop & Go — maintains following distance in all traffic conditions
- Automatic High Beams
- Pedestrian/Cyclist Emergency Braking
Because the DASM combines camera and radar, the calibration procedure addresses both simultaneously. It’s more involved than a camera-only calibration on a GM or Toyota truck.
Stellantis Calibration Requirements for the Ram
The Ram 1500’s DASM requires calibration after:
- Windshield removal, installation, or replacement
- DASM module removal, installation, or replacement
- Diagnostic trouble codes related to the DASM
- Tire diameter changes (larger tires, different wheel sizes)
- Front-end collision repair
The Calibration Procedure
1. Diagnostic connection — Connect to OBD-II and authenticate with Stellantis (AutoAuth required — we have active registration)
2. DASM Auto Alignment — The scan tool initiates the calibration special test
3. Drive cycle — The Ram is driven at highway speeds on well-marked roads. The combined camera/radar system uses real-world references to establish alignment
4. Verification — Scan tool confirms calibration completion, all DTCs cleared, and ADAS features operational
The drive cycle portion can take up to an hour depending on road conditions and system response. We have established routes that provide consistent, reliable calibration results.
Ram 1500-Specific Considerations
Tradesman, Big Horn, Laramie, Longhorn, Limited, TRX
All trims with the DASM module require calibration. Even the base Tradesman with Forward Collision Warning needs it. The higher trims — Laramie, Longhorn, Limited — have more features tied to the DASM and may involve additional verification.
The TRX
The Ram 1500 TRX has a significantly different ride height and suspension geometry from the standard Ram. The DASM calibration must account for this — using factory TRX specs, not standard 1500 values. We know the difference.
Lifted Rams
The Ram 1500 is one of the most commonly lifted trucks in our area. If you’ve installed a 2-inch, 4-inch, or 6-inch lift, aftermarket bumper, or different tire size, the DASM needs recalibration. A windshield replacement is the ideal time to address this.
Tire diameter changes are a specific Stellantis trigger for DASM recalibration. If you’ve gone from stock 275/55R20 to 35-inch tires and haven’t recalibrated, your forward collision warning and adaptive cruise control are reading distances incorrectly.
Ram 1500 Classic
The Classic (DS platform, sold alongside the DT through 2024) has a simpler forward camera system without the integrated DASM. Calibration is still required but follows a different procedure. We handle both platforms.
> “Put 35s and a 3-inch lift on my Ram. Lane keeping went haywire. Needed a windshield anyway from a rock on I-80 — Nex recalibrated the DASM for my actual setup. Everything works again.”
> — 2023 Ram 1500 Laramie owner ⭐⭐⭐⭐⭐
What It Costs
Windshield replacement (no ADAS): $250–$400.
Windshield replacement + DASM calibration: $500–$800 total. The DASM’s integrated camera/radar calibration is slightly more involved than camera-only systems.
Compared to the Ram dealership: Dealers typically charge $400–$650 for DASM calibration alone, on top of their glass pricing. Total at the dealer: $800–$1,200+.
Insurance: California comprehensive coverage includes windshield replacement, usually with no deductible. We handle the entire claim.
Frequently Asked Questions
Does my Ram 1500 need calibration after windshield replacement?
Yes. All 2019+ Ram 1500 DT models with the DASM module require calibration. The DASM is standard on most trims.
What’s the difference between the DASM and a regular camera?
The DASM integrates both the forward camera and radar into one windshield-mounted unit. This means one calibration procedure covers both sensors, but it’s more precise than a camera-only calibration.
I changed my tire size. Do I need to recalibrate?
Yes. Tire diameter changes are a specific Stellantis trigger for DASM recalibration. The radar component uses tire rotation data for speed and distance calculations.
How long does it take?
Glass replacement: 60–90 minutes. DASM calibration: 60–90 minutes including the drive cycle. Adhesive cure time: 1 hour. Total: 3–4 hours.
My LaneSense hasn’t worked since my last windshield replacement. Can you fix it?
Almost certainly. This is the most common symptom of a skipped DASM calibration. We see this regularly with Rams that had glass replaced at shops that didn’t perform calibration.
What Ram Owners Say
> “My LaneSense stopped working after a chain shop replaced my windshield. They said it was a ‘computer problem.’ Nex ran the calibration and it works perfectly now. Wish I’d come here first.”
> — 2022 Ram 1500 Big Horn owner ⭐⭐⭐⭐⭐
> “They knew what the DASM was before I finished explaining. Most shops have never heard of it.”
> — 2024 Ram 1500 Limited owner ⭐⭐⭐⭐⭐
Nex Automotive is an auto glass replacement, ADAS calibration, and full-service automotive repair facility at 4660 Pacific Street Suite 120, Rocklin, CA 95677. The shop specializes in Ram 1500 windshield replacement with in-house Stellantis-spec DASM module calibration, covering both camera and radar alignment. Nex handles all Ram trims from Tradesman through TRX, including lifted and modified trucks. Nex is the sister company of Kniesel’s Collision, a 4th-generation family business serving the Sacramento region since 1968.
Get Your Ram’s Windshield Done Right
Nex Automotive
4660 Pacific Street, Suite 120
Rocklin, CA 95677
📞 (916) 472-2928
Monday–Friday 8am–5pm | Saturday by appointment